I'd recommend 13mike's hemtt wheels, I'll post some pictures up of them in his original thread. As far as tires, you will have to keep a close eye out for deals or pay shipping from far away. Just make a list of everything you need and start acquiring it in bits and pieces.
I got my tires in 2 different deals, and I have 2 different treads; but I still got them! craigslist usually has a m105 trailer or 2, I would have had an extra if GL didn't cancel my sale. There are some guys in Montrose who are bobbing deuces, find them on craigslist and see what parts they might sell. There is another place down by kalamazoo that often advertises parts and stuff, but some folks on here have had bad experiences with them.
Just keep your eyes peeled and network with us guys here in MI and you will be able to locate everything you need eventually. Digitaldust helped me find an instrument panel, so make friends!