I had a similar problem with my 59, the bed was worn and the saddle was not usable. I replaced the bed with a used bed from a mfg. lathe that was nice and straight, less than .001" of wear. I had two used saddles. The first one was worn convex, so it had a gap of .008" at the ends. The second was one from Mare Island that was in a lot of parts I bought at a Mare Island auction. It had been ground and built up with delrin, and it was a perfect fit. The only thing it was missing was the zigzag pattern for the oil groove. I cut that on the FP2NC mill with a ball mill and it came out nice. I had to be careful not to cut too deep, but since the vee is 60 degrees, doing the calcs was easy, it was just a 30/60/90 triangle.