I bought a 10V from a U.S.-based company, but wouldn't recommend them again. Delivery was timely enough, but they've not responded to subsequent communication. Since my next purchase would likely be twice the amount of the 10V, they've lost me as a customer because of that.
I contacted the nice folks at Stuart for replacement castings - they responded immediately and are happy to ship to the U.S. Lead time is a consideration, mostly due to the current hyper-sensitivity of U.S. Customs. I'm going to buy my next model directly from the source. After factoring in shipping, the price is the same or slightly less buying direct (at current exchange rates). It took the kit three weeks to arrive from the U.S. company, and I figure about the same from the U.K.
I don't want to post the name or URL of the company I dealt with here, but I will pass it on via private correspondence for anyone interested.