Ag,
I have a briefcase holster at work. The briefcase is made of ballistic nylon and the holster is inside a pouch on the side. Side pouch is velcroed and the holster is inside, also velcroed. Holster was large enough for a Beretta 92. And I think it has a mag pouch. If you are really interested, I will see who makes it. It was given to me at work. I have a feeling it will run you around $150, more or less.
Dang near indestructable.
Terry