Doing another relatively quick search, here are some part numbers I dug up for all of them.
MB5Z-5035-A: ST, Aviator, & w/o air suspension (shown below)
MB5Z-5035-B: Interceptor, & w/air suspension
MB5Z-5035-C: 2.3, LX, base (shown in Post #38)
Obviously you would have to run your VIN, but chances are all ST's should have the "-A" version (as my VIN also confirmed). Definitely should be something that ought to be explored for those that have ripped the differential out. Ford just needs to use the correct subframe, so hopefully what I've found will help!