The G-14 was probably a bit much, as they started to appear in the late spring, early summer of 1944. P-38s and P-47s, with a few notable exceptions, were doing more low-level ground work as the P-51s took over long-range escort duties. The B-model Mustangs were certainly spot-on. D-model Mustangs appeared about the same time as the G-14, mid-1944.
The A-5 and A-8 would have been appropriate, as would the 109G-6.
Jimson, to answer your question - I was the Director of the NJ Aviation Hall of Fame and Museum for nearly 10 years. Now, I do consulting to the aircraft restoration community, do pre-restoration airframe evaluations for museums (before they invest huge dollars only to learn they'll never fly their plane again), and I'm a professional model-maker. I have a closed list of clients (they fight over whatever I decide to build), and I do contract work for Lockheed, although that's pretty much dried up with the current administration in the White House.
J