Spotted this on another forum:
http://forum.keypublishing.co.uk/showthread.php?t=94262
As I can no longer post there I wonder if anyone can help Mike Rondot the aviation artist) with this? If so, I will try to ensure that any answer is relayed back to him - unless anyone with an answer/leads can post directly on the above forum?
Long time since I spoke/corresponded with Mike. Would be good to know that someone can help him!