Pretty much the vast majority looks like a tactical vest - obvious gun vest...
I have one like this one. It has internal pockets and access to hold a holster/firearm. Design allows it to not look like the firearm is weighing you down on one side. So from the outside it's nice and smooth. Lots of little pockets. This one is designed for communication gear and all holds documents in the back panel. http://www.patriotoutfitters.com/scripts/z.exe/sbproc?action=sp3893&path=thefind&utm_source=thefind
These not so obvious vest will run you around $100-$175
I just purchased a Carhardt work jacket with hoodie. It has an inside pocket that has a small velcro at top of inside pocket to secure whatever may be in the pocket.
My 642 fits nicely in the pocket, and works very well. Not noticeable, since the jacket is a heavy one.
This company may have what you want. I just purchased the MA-1 flight jacket. It has the same pockets seen on the outside (with snaps) on the inside as well. Great for a pocket carry holster/gun.