A good friend of mine owns this company and has availability for additional clients.
http://www.apexnetstudios.com/
He builds pretty much any size and type of website (communities, general sites, e-commerce, etc) and has done a LOT of work in the motorsports industries including motorsports promotions. He built our previous Red Flag Fund site with the e-commerce portion.
If you're considering building a site, give Layton a shout and see what he can do.
Cheers.
-Jeff