Call these folks:
http://www.affordable-cases.com/
They can build one. I have a single bass full ATA case they built that has survived about 50 flights.
A few years back, I painted it olive drab, which was probably stupid, because "due to 9/11" and Security Mystery Theater 5000 (TSA), it is always suspected that inside is some sort of firearm or missile launcher that I want to check. Really.
