Don,
Williams Brothers does a 1/72nd C-46. The kit I have has markings for early and late USAAC, Nationalist Chinese Air Force, and, Flying Tiger Line The kit is VERY nicely detailed, molded in light gray styrene with options for 3 and 4 blade props, both rubber and plastic wheels, the engines have separate cylinder banks, and, there is pretty nice flight deck detail but the main cabin is just the floor. There is no provision for opening the main cabin hatch and, it looks like opening it would be pretty difficult. As with all Williams Brothers kits, there are good instructions for the modifications required for the different versions.
There is also a limited edition of the kit that is molded in a nightmarish shade of blue. I saw one at the Glenn Curtiss Museum in Hammondsport, Ny.
All the best
Ray
BTW...The 1/72nd C-46 is almost as large as the 1/48th C-47!