I have One Sparco "Roadster " fiberglass racing seat. I'm also selling the brackets with the seat.
You can see the seat and specs on Sparco's website:
http://sparcousa.com/pseats_street.asp?id=199

Here is the link to the brackets:
http://www.sparcousa.com/pseats_acc.asp?id=153

These are a $710 value. I'm asking $300.
The seat cover is NOT in perfect condition. A side bolster panel is worn out, and there are wear spots on other areas.
A brand new seat cover from Sparco was ~150 last time I checked. The covers are removable and washable, so it is an easy DIY fix.
Local pickup preferred, but I will ship at buyers expense.
Email me for more pics.
Thanks,
Jeremy