So, it looks like I have two options at this point, assuming I want to retain compatibility with the OEM in-car system.
Option one: Build a solution. I have a cheapie (<$10) 315 MHz receiver on order that should be able to receive OEM sensor data. Will enjoy trying to decode the data stream.
Option two: Buy new sensors that output both OEM Subaru data and Ford compatible data streams and then buy a unit that can display the detailed Ford data. This would be at least $200 or more for parts and require replacing the sensors on all tires for additional $$.
Option 2 should work if I can't figure anything else out, but I'd really like to have a go at decoding the OEM wireless data stream.
Yes, I'm a nerd.