Hi Scott, welcome to Aeroscale, and all of Kitmaker Network.
I was initially wondering about the kit manufacturers, too. After looking at everything I am 100% certain that the P-38, Cletrac, and trailer are Monogram, and 99% certain the fuel and supply truck are Tamiya. Have not built either of those two but Tamiya makes such kits.
The modeler definitely put in a lot of work sanding off all those Lockheed rivets. 