Well, I've done some searching, and can't find anyone who makes a harness bar *specifically* for my car... Or at least, if they do, I can't find any listings.
I've gotten in touch with a company in Davis, CA, Evil Genius Racing, that does a ton of roll cages and custom fabrication, and they tell me that they can make one for me for about $250, which ain't too bad, but they would either need my car for a day, or at least another RS coupe to take measurements from. The guy I spoke to even said he'd offer a discount to any of my freinds/club members that also wanted a harness bar made, and would let him use their car for the day for measurements.
So... input/suggestions/directions? Anybody have an RS coupe living in Davis and want a harness bar!?!

Or does anyone else know of any companies producing pre-fabbed ones for GC's?