I don't know if it would meet your requirements, but I have made something that might inspire you :

http://www.davidmanise.com/cgi-bin/yabb/YaBB.cgi?board=matos;action=display;num=1121850443

I've posted the explanations and pictures on a french forum I hang on a lot.
It is made of Cordura 500D (camo) with YKK weather resistant zippers, Velcro hook and loops and Duraflex hardware. It took me several hours of work, of course.

bye

Fabrice
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