Summary

I broke the leg fitting for my Ultimate Support TS-30 bike workstand. Ultimate Support doesn't make an exact replacement for a 24 year old part. The closest they have (as of mid 2019) is their part number 13494 leg fitting-http://www.ultimatesupport.com/leg-fitting.html.

However, it is designed for a 1-3/4" outer tube and mine is 1-5/8", so I made this shim with flanges on it so it doesn't slide out. Print three pieces.

Note that the bike stand business is now under the ownership of Feedback Sports https://www.feedbacksports.com/. They do not have a replacement part, but if you give them a good, sob story, they may be able to make you a deal on a replacement tripod where you would need to swap over your bike clamp. Either just the clamp or the sliding upper tube assembly with the bike clamp on it.

Two almost identical parts are included here, one full size: 1-5/8" to 1-3/4" shim, and one that's sized with an extra 0.010" clearance. I printed the former and it was too tight, so I only used two of the three pieces.

Note too that if you buy that 13494 part, you will also need the collar clamp http://www.ultimatesupport.com/collar-clamp.html part #13519. You may be able to use your quick release, though it is a bit short, or buy either the ZKB-175 Hand Knob http://www.ultimatesupport.com/zkb-175-hand-knob-1-75-44mm.html part number 13805, or the quick release Lever/Hinge http://www.ultimatesupport.com/lever-hinge.html part #14929.