Originally Posted by True Faith
FWIW, the wheel can be ordered online from Tischer BMW (in MD) here:
I used the 125/70 18 tire, as well--the Maaxis looks like a better solution, but if you have trouble tracking that down, Tire Rack sells the Continental 125/70 18 tire. It's hard to find online, but if you call them they have no trouble looking it up.
Thanks for the suggested wheel/tire options. I do get a "regional manager's friend" discount at a tire chain, so I might be able to track down either of those without too much difficulty.