One place you could try, which would be easier than ordering from abroad is
www.analogic.co.ukThey are based in Kingston, on the outskirts of London.
They sell many amiga accelerators, and also do repairs and mods, so they should be able to answer any questions you may have.
Sometimes they can be a bit flaky, like saying they have an item in stock when they don't, but mainly they are quite good. Their amiga bloke is called Tim.
regards
Rassilon
