I finally created a table of contents of the drawings for the two documents available on VM. The first was uploaded by Keith Rucker. Link here...
Rivett Lathe Mfg. Co. - Publication Reprints - 1020S Manual and Parts Drawings | VintageMachinery.org
The second was uploaded by Carl Kulyk. Link here...
Rivett Lathe Mfg. Co. - Publication Reprints - Rivett 10=20f factory drawings | VintageMachinery.org
The TOC for the first is as follows:
1020S-L Lubrication Diagram
1020S Floor Plan - 2 sheets
1030 M&S Floor Plan - sheet 1 of 2 only
1020S-2A Lever Chuck Closer
1020R-9A Slide Rest With Taper Attachment
1020R-9B Slide Rest Without Taper Attachment
1020S-9T & 9U Micro-Dial Assembly 2-22-50
1020S-10A Idler Assembly 3-21-49
1020S-10B Drive Mount 12-20-49
1020S-10C Bed Mount 12-21-49
1020S-12 Headstock Assembly 3 sheets
Headstock Key Sheet
LN-1020S-A Ball Thrust Draw-In Spindle 5-10-51
1020S-16A C'Shaft Assembly 3-8-49
1020S-16B Clutch Shifter 3-20-49
10s0S-16C Clutch Shaft Assem. 3-17-49
1020S-16E Clutch Shaft Assembly
1020S-16 FUS Drive Plate Assem.
1020R-22 Tailstock
1020S-20 Gear Box - 2 sheets
Gear Box Key Sheet
1020S-22 Tailstock
1020R-22 Tailstock
1020S-23 Bed
1020S-23 A+B Idler Gear Assemblies
1020S-26 Carriage - Apron - sheets 1 & 2 of 3
1020S-26 Clutch Assy - sheet 3 of 3 4-8-60
1020S-63 Micrometer Stop 2-18-49
1020S-63A Multiple Micro. Stop
Wiring diagram no label
1020S-73S Wiring Diagram 3-3-50
1020S-73T Control Panel Wiring
1020S-7? Control Panel Wiring
1020S-73U Wiring Diagram 9-16-49
1020S-73UA Wiring Diagram 6-10-55 Lathe With Stop Rod Control Circuit "U.S. Vari-Drive"
1020S-73VA Wiring Diagram 6-10-55 Lathe With Stop Rod Complete Circuit "U.S. Vari-Drive"
1020S-73V Wiring Diagram 9-14-49 Lathe With Stop Rod Complete Circuit "Star Brakemotor"
The second is...
1020S-L Lubrication Diagram
1020S Floor Plan - 2 sheets
1030 M&S Floor Plan - sheet 1 of 2 only
1020S-2A Lever Chuck Closer
1020R-9A Slide Rest With Taper Attachment
1020R-9B Slide Rest Without Taper Attachment
1020S-9T & 9U Micro-Dial Assembly 2-22-50
1020S-10A Idler Assembly 3-21-49
1020S-10B Drive Mount 12-20-49
1020S-10C Bed Mount 12-21-49
1020S-12 Headstock Assembly 3 sheets
Headstock Key Sheet
LN-1020S-A Ball Thrust Draw-In Spindle 5-10-51
1020S-16A C'Shaft Assembly 3-8-49
1020S-16B Clutch Shifter 3-20-49
10s0S-16C Clutch Shaft Assem. 3-17-49
1020S-16E Clutch Shaft Assembly
1020S-16 FUS Drive Plate Assem.
1020R-22 Tailstock
1020S-20 Gear Box - 2 sheets
Gear Box Key Sheet
1020S-22 Tailstock
1020R-22 Tailstock
1020S-23 Bed
1020S-23 A+B Idler Gear Assemblies
1020S-26 Carriage - Apron - sheets 1 & 2 of 3
1020S-26 Clutch Assy - sheet 3 of 3 4-8-60
1020S-63 Micrometer Stop 2-18-49
1020S-63A Multiple Micro. Stop
Wiring diagram no label
1020S-73S Wiring Diagram 3-3-50
1020S-73T Control Panel Wiring
1020S-7? Control Panel Wiring
1020S-73U Wiring Diagram 9-16-49
1020S-73UA Wiring Diagram 6-10-55 Lathe With Stop Rod Control Circuit "U.S. Vari-Drive"
1020S-73VA Wiring Diagram 6-10-55 Lathe With Stop Rod Complete Circuit "U.S. Vari-Drive"
1020S-73V Wiring Diagram 9-14-49 Lathe With Stop Rod Complete Circuit "Star Brakemotor"
The ones on the 2nd list above are marked duplicate if they're also in the first list. I may at the very least try to combine these two PDF's and put them in the proper order.
Of the documents Steve sent me, I only found two new ones that aren't in either of the above. They are...
1020F-16-1000 Main Drive Assy. 3-13-62
1020F-69-1000 Follower Rest 2 1/4" Capacity 8-29-61
I will say that the documents he sent appear to be higher quality than the ones in the documents above but I do question the value of re-scanning them. Steve has about 30 of these drawings that I could scan but they'd really only be higher quality of what's already out there (except for the two). I went by a local Office Depot today that wanted $3 per scan and 3 days to do it. At that price I almost feel like it's worth it to by an HP OfficeJet for $180 with an 11x17 scanner on it.