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Get from the guy called FlashinaPan on Talk Photography forums; there is a sticky in one of the forums. He is in the UK and has had hundreds of buyers with great feedback. I got mine from him and would very much recommend. May be a few quid more (possibly?) but worth it on peace of mind. He also does the wireless triggers and lots of other strobist stuff. That said, I don't know what he has in stock, so worth dropping him a message first. Hope its of use.
EDIT: Great thread by the way, an interesting read.
he doesnt have stock at the moment but has told me that should be coming in soon. apparently a supplier issue but i recommend him, great service and good turnaround time too.