My first choice is a full set of 5 (4 plus the spare) 1/35 M38A1 or M38A1C wheels from the AFV Club/Skybow models.
If not, 2 wheels from the 1/35 Tamiya (or Academy copy) M151A2 with plastic wheels (not Academy's new version with rubber wheels) will do.
I have lots to trade, let me know what you are looking for.
Gino P. Quintiliani
Field Artillery --- The KING of BATTLE!!!