I'm wiring in a new American Rotary RPC for a 1440E. It appears very well made and has a Baldor idler. It came packed to survive a small nuclear event, with the idler bolted to a wooden frame, attached to a pallet, with the double-boxed control box shrink-wrapped to the top. I should be powering it up later today and getting the lathe later this week or early next week.
I was unable to find an RPC this size used. I don't run production so I got the AR-20. My old American Rotary 5HP RPC, bought used, has been completely trouble-free, and their technical customer support is excellent even if you were not the original buyer. That and the build quality of the old RPC are the reasons I spent a bit more to buy another from them.