The only person I know of that could possibly have some is Keith Portsmore. He built several, but has quit doing them. Planning on doing a replica? It is a daunting task. I spent one entire summer and almost 2000 hours reproducing 140 pieces of complex pieces of ash doing mine, and I had the original body to work from.
I have always admired the lines of an Airline and just recently came across the group of frame photographs in "Technical Pictures" and thought that would be an interesting challenge if ever I was to have some time on my hands, I think the wood work would be just about within my capability, the metal skinning another matter.