Well, I may have sent you down a dead end. My apologies. It looks as though UPStart does not provide the numerical product ID. Premise does. What's strange is, that even if the Premise driver doesn't support the module, it should still see it and report it as Unknown.
Try this. Leave the PIM connected directly to the PC, not the Elk. Make sure the network setting is set to the correct serial port. Make sure that the communication failure setting is not True. Then check the box labeled Force Network Enumeration. That forces Premise to do a complete scan of the UPB network. You should then see the 2 devices show up as unknown something or other. If they do, then they should have the info I am looking for in the Device Base section of the Properties Pane.
The fact that you could get the info you did via UPStart means that the UPB network works fine.