Verlinden makes a 1/48 set of US Naval Aviators, WWII era. Dont know if it's still in production or not. For the turret gunner, you may able to scrounge one from the Monogram B-26 Marauder kit. It had a good one for the top turret that may fit. Also their Pro Modeler PBY-5A kit came with some great air crew figures.
F is for FIRE, That burns down the whole town!
U is for URANIUM... BOMBS!
N is for NO SURVIVORS...
- Plankton
LSM