Pretty sure all the steering wheels are cross-compatible, mechanically, if you don't care about making electrical connections... but might as well go straight to aftermarket if you're trying to minimalize, in my opinion.
I don't think that there is an alternative to the plastic cap on the turbine wheels but I'd be interested if anyone has come up with a solution because I hate those things. I just took my center caps off and got chrome lug nuts... rather go for the one-piece wheel look than look at the contrast between nice aluminum and crappy '80s simulated aluminum plastic.