Craftsman lathe

This Craftsman 12x 36 is the same one I had for quite a while. Made a lot of parts on it to rebuild other lathes, as well as itself. I ran out of space and had to sell four lathes, two milling machines and a small shaper. Now I have an Austrian EMCO Super 11, which is a pretty nice machine and I can still take it apart to get it into my basement. Couldn't find a real pic of my EMCO but it looks like this and I do have the milling attachement.
View attachment 1716271736
You know a ton about these little machines! Do you know where one could find a tailstock leadscrew that's in good shape for one of these Craftsman 12" lathes. It's hard to tell from photos on ebay if the threads on a used piece are worth a crap.