Copy & Paste from my post on this issue from the "other" forum....
Hand Clutch: McMaster-Carr part number 2868T192; Bronze SAE 863 bushing 7/8" ID & 1" OD, 1.5 inches long. Cut it in half and drive half in each side as the pivot is 2.125 inches long. You can get the hand clutch lever out with some wiggling w/o messing with the frame rail.
Foot clutch: No bushing originally (at least not in my 1956 WD45). I bought a 1 1/8 in drill bit and drilled out the clutch pedal pivot. McMaster-Carr part number 2868T201; Bronze SAE 863 bushing 1" ID and 1 1/8" OD, 1 inch long. The pedal pivot is 1.75 inches long so cut a 1/4 off one and drove them in, one from each side. I took the rear of the left side frame rail loose to get the clutch pedal out. Later I realized I think I could of just pulled the pivot pin out from the right side (that also has the brake pedals on the right side). If that pivot pin is REALLY worn you might consider replacing it as well. (as Butch mentions)
While neither was perfect after replacing the bushings, it cut about 90% of the play out compared to what I had and I was more than happy with that result. Good luck! Mike