Hy timbuk, I did some more research, I think your bus has the 5/10 stud on 8.75" bolt circle wheels, I checked the Accuride catalogue, and they have a 22.5" X 6.75" wheel listed there. That would limit the size of tire you could mount on them, but that is only one supplier/manufacture of wheels. Google Canadian Wheels, and send them a message and see what they have available, hope that helps.
