RE: .28 in a funfactor? oh dear....
Find yourself an 1/8 scale buggy roller and make a truggy out of it, you already have the engine, electronics, and wheels/tires.
You don't have to buy an actual manufactured truggy the only reason I got the Mammoth is because of the introductory price was a lot lower than making one, in fact I was looking at a Swift roller to do a conversion on. I have seen some Ofna Ultra MBX rollers go pretty cheap on Ebay and the Ultra MBX R2 roller is a really good deal.
The GS SUT is a really nice handling truck also but they are kind of expensive.
rolland