I looked back into some older posts and I finally found his ebay site, none were listed, probably best to contact him. Not a real hard thing to make, but it sure has to be a common repair on these, I am surprised no part supplier or mfr makes these, makes a niche market for him and thats a good thing. I'm leaning towards a new center piece, if I were to find one used, which would be fine, my concern, especially if found on the net, you really need to take a measurement with a micrometer or something to insure its within tolerance, standard bushing, and or trust someone else who measured the salvage part and will state that its good.
This tractor was about junk when I got it, and 11 years later, having a loader on since new or close to it, hard to imagine given the play the center has to be well worn. I'll keep an eye out, but it seems a new one would be easier, rebuild the core cradle I have and with the rest of the parts, it should be plug and play so to speak. Plan is the spindles first, at least one, move to the garage, then do the rest, thinking at least when done I won't have to worry about that front end coming apart !