I have made several requests to individuals who use this site for any information they may have or be able to get. So far I'm afraid there is little info apart from the parts I have been able to cross reference from the Trooper SWB 3.2.
So far I can source the following in the U.K.
Brake pads and disks, oil filter, air filter.
I am trying to get info on wheel bearings just in case there is a difference between the U.S. model and the Japanese one.
Otherwise I get most other common parts from the U.S. mail order