Wanted: Spec-R S15 Seats

[21Nemesis]

I am in the market for a Spec-R S15 passenger seat (US driver's seat). If anyone knows where I can get one please pass along the info. I currently have a regular S15 seat on the passenger side and like it. So, if the Spec-R seat is better, as far as "holding factor", I may be looking for a matching one as well. Here's what it looks like:
http://nissans15.com/img/sp_interior_b.jpg


Thanks!