Some of Roy's original Airfix artwork may be seen here..
http://www.vectis.co.uk/auccat.php?a...Cross+Art+Work.
Some of the prices realised are absurdly cheap for what you got for your money.
More about Roy, and his tremendous Airfix and Flight work here:
http://pws.prserv.net/gbinet.dbjames/cross.htm