Steve - good point! I'll see if I can find some of those for sale online*, as I can't get hold of them in the shops anything like as easily as the Humbrol paints
If all else fails, I'll see if I can find a tester pot of household wall paint in the right colour at the diy place next to where I work.
*BTW, what type & colour code did you use for the interior of your 7?
Cheers,
Paul