Absolutely what Flash said.
If you want to make the inevitable research needed for such info a bit easier, you might want to use the "search" function" on these forums. To narrow the results to recent clients, I would try, for instance, "bank" and "within 12 months" or whatever the reasonable time period seems to be. Yes, you will get some useless hits, like stories of crazy things that happened at a bank," but you will almost certainly turn up some MSC names to match shop types. If you use the wonderful Excel spreadsheet from the New Mystery Shoppers area of the forums, just add a column to note the types of shops for each MSC on your list.
Based in MD, near DC
Shopping from the Carolinas to New York
Have video cam; will travel
Poor customer service? Don't get mad; get video.