I didn't know that part existed. How do you find out about parts like that? It sounds like it would work, but I can't find a picture of it online to verify that it doesn't have the boot that gets in the way by sticking up too far and pushing the ceiling tile up on the AP325.
Mostly I no longer have this problem any more because though we've still got AP325's installed, we've started installing AP515's now as we upgrade older AP's. The AP515 solves this problem by having the network jack connect to the AP parallel to the ceiling rather than perpendicular to it.