Well there is this available:
Superformance Owners Association ** FOR SALE SITE **
Or you can go for a new Caterham Seven. The Caterham were distributed by Superformance but are now done directly to the dealers by the factory resulting in a
large price reduction. Oh, BTW, I am a Caterham dealer.
My Caterham guy is hooked up with the resale market for both gennie Lotus Sevens (we had a real Lotus 6 here that sold back to the UK) as well as Caterham from the last 30 years so if you want info, contact me and I will put you in touch with Tony.