I've found a few more companies supplying the kit (or variations thereof - reverb and fretwire) and the original manufacturer's website. Minimum order of 10 units, so not a route to a cheaper unit but nice to see the full catalogue!
I had spotted a pre built one that had been left in natural finish on ebay, but the seller had treated the wood with petroleum jelly. As one of the UK suppliers offer the kit for ~£115 I decided £75 was my limit for something that wanted stripping and a lot of work before I could lacquer, which is also a lot of work! As you may have guess I missed it, it went for 76, implying someone had put in a bid higher still than that.
I'll browse the whole catalogue and see if these UK suppliers are willing to add a specific model to their next order when I'm ready to go - or just go with the same one discussed on this thread.
http://www.byguitars.com/