Thanks for the replies.
Unfortunately, the one in the USA is out of my price range, particularly when you add on import duty; also, I would not buy any instrument without trying it first!
The one at GuitarGuitar in the UK is exactly what I'm looking for, unfortunately, it's only got half as many strings as I want!!
Finding a 350/12 (at the realistic price) seems to be like seeking the holy grail............. I'll just have to keep looking.