Greg, I think you're right, A 60's British Army scheme should look good. If we as modellers can have 1946 luftwaffe aircraft, why not a Skyvan on trial for the Army?
here's a thought, there are a few NASA models around, and maybe some aftermarket decals, can you get the correct colour from one of them? The Testors U2 I built had blue stripes if memory serves.
So, once again, thanks to all for your help, but it may well be a Brit s**thouse!