Try D.C.Cook Motorsport,Unit 33 Silverstone Circuit,Silverstone,Towcester,Northants,
NN12 8TN. Tel:01327 857875 ask for Steve he was helpfull when I needed some bits for my kit as I did not want to pay WAT its like Caterham added tax but 0.5% cheaper.I got between 5% and 15% discount.
paul