I've been looking for the frequencies for the Security at the Rose Quarter, but haven't had any luck in the FCC database or anything. If anyone happens to have any idea on what they are, I'd love to know!
Thats it! Portland Arena Management was the company that managed the Rose Quarter a few years back before Paul Allen bought it back again. I don't know why I didn't think of looking up under one of those names..
I haven't verified it myself, but this one has to be it.