Sb 16/24x 6 parts

Craigslist find sb 16/24x6
Mostly complete it needs some work on the half nut and gib.
Also I need to find a riser block casting for the compound. someone along the way fabricated a riser block out of steel sq tube and thick plate. I would like to find sb parts to get her back online.
It has a serial number 11617hkx15.
I have the serial card and this lathe didn't have any attachments from the factory.steady,follow,taper,grinding attachments nothing.
The guy at grizzly didn't have an answer for me as to what the x ( special)parts list would be. Do any of you guys know what could have come in a special config that wouldn't be listed.
I am going to get some pics up and list the serial card shortly.
Thanks for your help.
Nake

I can help you with pictures or measurements of the riser block if you need!
I will never give mine up, till the carry me out!

ok i spent today going thru the box of stuff that came with the lathe to see what was there and if it could help me. i took the apron apart and knocked the chunks off inspected the half nut and found the half nut gib. the apron is intact the half nut works the clutch works all the gears are in good shape. i wired the starter and pushed the button. smoke ! . so i have the motor out and am trying to find some info on the motor so i can get it back on line. it looks like the previous owner used it to turn rocks. chalk dust and lithium grease all over the place. apparently it came from a geology/physics dept on the ucsb campus. really if any metal turning guy saw this thing they would say it was in good shape just dirty.
the motor is baldor 2 hp 3 phase 208/220-440 and looks like it is a lot newer than 1964 as my serial card says this lathe is. it looks like someone packed it in water and chalk. caked with white powder and smells like burnt plastic.
so to conclude i still need a compound and riser for this thing cuz what they put together is a hodge podge of sb 16 parts for the cross/compound to run this thing. a little elbow grease and effort in assembly should yield a working unit.. i took pics today when so when i get cleaned up tonight i will post them.