Hasegaw has a few sets of aircraft ground crew in 1/72, both AF and Navy.
Check here for more: http://www.greatmodels.com/cgi/search.cgi?termscat=Figures_1/72
Here is their USAF set:
Gino P. Quintiliani - Field Artillery - The KING of BATTLE!!!
Check out my Gallery: https://app.photobucket.com/u/HeavyArty
"People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." -- George Orwell