I looked into this several years ago, when I need colour schemes for 1/300 aircraft.
I remember going to a show in the uk, and myself and a mate both bought a copy of a hardback, a4 book, showing plenty of colour plates of the aircraft involved.
We were absolutely made up, that we had colour pictures of what we were after.
If we had looked a little closer, we would have noticed the book was written in Polish...oh well, it was the pictures we were after.
Then about a year ago, I bought a paperback, a4 publication by W. H. Smiths in the uk.
I guess it was called Air war over Korea.
This too had colour pictures in it, that would be useful.
You may be dale to still get it on line ?
Hope this helps.