A friend (which is both a jetpilot and a CAD guy [8D]) and me, made these, they are heavy, but very nice to have everything in "one box", air and fuelpump are located in the bottom of the trolley together with two 28 amp/h Gel batteries. On top is 20 ltr's of kero
I charge my planes from the trolley at the field (so does some of my flying buddies

)
drawings in pdf:
www.moonbounce.dk/trolley/Trolley-PDF_2D.zip
Autocad:
www.moonbounce.dk/trolley/Trolley_AC2000_2D.zip