Second the question from Oliver B! Also depends a bit what type of parts you're after, ie 'standard' or upgraded? Anyway some links to study would be: www.berlin-tuning.com www.evilution.co.uk (not a part supplier but loads of useful information/links)
Generally ebay turns up standard spares fairly reliably eg I just bought a replacement MAP sensor from Bulgaria (Nadia autoparts I think it was), & an IAT sensor from Germany. - helps to have the model Nr written on the old / broken part to speed the ebay search. Regards Rob
I am still thinking about importing a Roadster as a rolling chassis (not subject to FMVSS) and putting a US engine, gearbox and electronics into it. The delay in deciding on that project is because of a Lotus Turbo Esprit project that is taking about a year longer to finish than expected (which is kinda OK since early Esprit prices have shot up in the last year).
I have another car that wasn't brought into the US and I get parts for it direct from Europe.