Actually, in this case, I think you need a list of scanners that can be computer controlled. This is due to the fact that these scanners send their alpha tags out with everything else when they are using a virtual screen via a PC- so in theory, at least, you should be able to capture their tags when using it for a feed..
Since this is a RS forum, you should be able to do that with a PRO-197 / 652 or a PRO-106 / 651 (the second number is the 'rebadged' number, but it's still the same radio...). If you're talking old radios, a PRO-2052 is a possibility, but note that it's not rebanding capable, so be aware of that if you are trying to put a trunk system into something like Broadcastify.
Mike