I've seen this at the local Army Surplus store.

http://www.countycomm.com/pockxl.html

Here is a larger one, but it would definitely stand out in a professional setting.

http://www.countycomm.com/pocket.html

I think this one might work in a more professional setting if it wasn't for the molle. Perhaps one of those conceal carry planners would fit in the best in a professional setting.

http://www.countycomm.com/respond.html
http://www.countycomm.com/tacfo.html