If you live in the south east of England, it may be worth giving P&O Stena at Harwich a call. They can arrange a trip over on the fast ferry and contact dealerships in Hoek van Holland and Rotterdam who are more than willing to sell you RHD cars.
I live close by and the dealer who just delivered my (Cloggie LHD) company car was desperate to get my father to come into his showroom to do a deal for importing into the UK. Here is an example, the old fella showed interest in buying a Volvo V40 2.0 16v, once it was loaded with all the toys like onboard trip computer, GPS Nav system, A/C leather seats alloy wheels etc., the saving was not a kick in the @rse away from GBP6.5k. Alot of that was due to the exchange rate between the pound and the euro, which at the moment is the best way of paying. The cloggies are pretty good at speaking English but if you need an interpreter just give me a shout.
------------------
A clear conscience is usually the sign of a bad memory.