Probably a silly problem, but I thought I'd ask. I need a set of tires for my 89. It currently has, what I assume are the correct size tires; 225/55/ZR16. I'd like to replace the black walls with either white quarter walls, or raised white letter. Just thought they'd look nice. After checking with several major tire dealers, I'm told I'm stuck with black walls. Even if I go to a less "high performance" tire. Anybody got a source?? Thanks.