Those have been out for a long time-There made by custom woodcraft. I had 1 too way back in the 80's when I worked at futaba. I think you can get 1 here.

http://users.adelphia.net/~rutanman/AltoonaRC/Links/The%20Flight%20Box,%20Radio%20Control%20(RC)%20Air plane%20Field%20Box.htm

the last 1 for sale here had a asking price of $60

http://www.rcuniverse.com/market/item.cfm?itemId=269986

The seller on ebay says he paid $450 for his?? I wonder how many airplanes-radio's that included? or maybe he misplaced a decimal and meant $45.00
There only $150 or $175 for the xlarge. oohh wait the seller has only been on ebay for 4 days-that explains it.