Mgawa-
I dug my 1/72 Williams Bros. B-10 out of the drawer, stashed away after a tragic blue/yellow paint bleedover accident last year. It's a B-10B, in the instructions it shows the full scale wingspan to be 70' 6". 1/72 scale works out to be 11 3/4", I measured the built model and it was 11 11/16", so it's really close to being right. (my Williams Bros. C-46 has always seemed bigger than it should be, so now I'm thinking I should measure it!)
You can still find these on ebay once in a while. It's been a little over a month now, but another WIXer had one of these kits he was selling.
http://warbirdinformationexchange.org/p ... hp?t=31102Greg
As I know few months ago Jack Cook have put one image from Hawai where is seen B-10... or maybe I am wrong?