Almost any of the commercial "Flight Boxes" would serve the purpose. I went to a hardware store and bought a large plastic "toolbox". It has depressions in the sides that would be ideal for mounting a 12 volt battery and small fuel container; there's a liftout tray inside large enough for voltmeter, tach, screwdrivers, pliers, prop wrench, glow igniter.... all that stuff.

Under the tray I can put my starter, extra props, stuff for clean-up (roll of paper towels, etc.), and still have room for a transmitter.

Best of all, it cost me a whole $15.00, and it works well as a seat when relaxing at the field!
Dennis-