That is by far and away one of the best suggestions I have ever received when looking for modelling solutions, so today I went through ALL my RN camo books and did not find anything to suit, but I have a couple of colleagues also looking so something may show up yet.
This is nowhere near the first time I have faced a problem like this , people sending me 3D prints of obscure subjects seem to assume I have all the info they need including decals just waiting to go.but such is life...
Thank you for the help

Hugh