I've always used JSF in Norwich.
I've known Steve (the owner) for years and although they're not as cheap as Paddock at least they are happy to order bits in if need be. Just ordered a dif guard and a streering guard form them and although the parts were about $30 more in total the shipping was less and it's coming over by fedex.
I'd quite happily recommend them to anyone. Also they do a lot of build ups for customers, so are able to give advice on mods etc. If any one wants their details I can post them up.

