Scoot. you show you are from Motown....there is a very active Cobra club in Detroit area ( Great Lakes Cobra Club/GLCC ), with montly meetings , many events with or without cars. About 125 members with at least 30 of those owning Superformance's. The rest of the members own a rainbow overview of the many other fine products on the market today.
I would suggest you come to a meeting, join the club, and get familiar first hand. the members are mostly not driving their cars now, but would welcome an opportunity to discuss their brand with you and why they chose what they did vs others...and most would likely still have access to their cars and welcome an opportunity to show them to you. remember, lots of folks store their cars offsite so cars are not readily accessible.
also Dynamic will have a Superformance display at Autorama at Cobo Hall , Detroit, in Feb (i think it is ) 2004
check out the GLCC website, and come join the fun . not too often you can find so many different brands in your own back door to look at and discuss with owners, see :
http://www.greatlakescobra.com/
also, check out the Performance Unlimited site that Scott posted earlier. Good luck in your search, Bill, Motown, SPF 156