Yep, noticed that one! I've just been looking at an old Monogram 1/48th P51D I built in 1995, as a 'K', or Mustang IV, in the colours of an RAF pilot I knew. It's faded and tarnished after being in sunlight for so long, so I'm going to do a 'make over'. I found some old decals for 'Moonbeam McSwine', but that's a 'D', so I might use the decals I have for Carson's 'Nooky Booky IV', which was a 'K'. I'm stuck with a 'K' as I altered the prop, so can only do one of those now. I have some other odds and ends of decals, so I'll look at some references and see what else can be done - sometime!
BTW, this was the same kit as your Revell example.