Any suggestions?
Well yes!
First off the source photo.
Little big but I did that so you can see the nose text better.
OK as the text underlined says this was the very first P-51B they got. So we know from other complete photos of the B models we have they did not get the stripes right off the bat they only had the tail numbers showing. We most likely will never know what this planes number was so that's out to skin it that way.
So did this plane survive long enough to get stripes? Who knows did it get its paint stripped off the tail so the red stripes stood out better. Maybe?
If you want to go with a theoretical plane that could be correct then I say stay with what you have got or go with what ever you like because all possibility's could be correct.
Or dump this particular aircraft out right and go with a completely different plane from the squadron.
I personally don't mind either just my two cents worth.