According to a thread I read on ultimate rc, Tamiya makes an adapter(part#53913) that will convert the rear from the old style hubs to standard 12mm hexes. For rear, I'd go with the hpi rs4mt ones, the wider offset makes them much closer to the stock offset than rustler/stampede wheels. I don't know if you'll be able to get a full set of those revolvers to work because you still need the front wheels to be the bearing in wheel type.

I know that hpi makes a couple styles of 2.2 wheels that will fit a 2wd mt.

SS stars
front
white-2100
black-2105
chrome-2125
gold-2130
rear
white-2135
black-2140
chrome-2160
gold-2165

f5 five spoke
front
white-3040
black-3041
chrome-3042
gunmetal-3043
yellow-3044
rear
white-3045
black-3046
chrome-3047
gunmetal-3048
yellow-3049

I'm pretty sure that these hpi wheels come with adapter, so you won't need that tamiya adapter, at least my hpi ss wheels did.