No love for the brick red spec.b interior, eh? I'd trade my black leather for it, just for something different. I haven't seen anyone offering it for sale though, just people saying they don't want it.
I also noticed these seats on ebay: http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=200410184919 I've never seen the black/silver with embroidered "GT", I'm guessing someone had them reupholstered? Although they have a bit of wear, they don't seem too expensive...