Hangar/Shelter

try using plastruct styrene sheets
http://www.plastruct.com/Pages/RetailPriceList.lasso

You didn't say what era you were looking for, but try this:
http://www.fiddlersgreen.net/AC/aircraft/Tent-Hanger-WWI/tent-hgr.htm
It's approximately 1/60, but can be resized with any graphics program.
Good luck
Greg

Anyone remember that old reventment Verlinden made way back when. I remember the pic had a F-4 setting in it. Any way this was the whole reventment all three sides of concrete with grass on top if i remember it correctly. This one looked like it could be used for a modern dio. But if you have no luck the styrene will work great aswell.