After WW2 there was an effort by a number of conversion businesses to create an updated Mustang for actual combat, as a close air support bird that could capitalize on all the surplus airframes and Merlin engines, but have all-new and more capable avionics. These were marketed to USAF as well as third world military. Don't remenber if Cavalier went after that market or not. Eventually, some came up with turboprop conversions of Mustang. I think some third world air forces bought a few of these things but the movement really never took off, and US certainly did not buy many, though I think they evaluated a few (though that may have been for assistance to our small country allies as military assistance).