Found this thread today and wanted to share the following story, similar to what you trying to achieve.
Not sure if you're aware but last year a Sega VR game was uncovered and "fixed" to make it run on a HTC Vive.
https://gamehistory.org/segavr/
P.S. Jag owner from 1998 and frequent visitor to another forum back then. My my, how time flies.
God speed on all your Jag endeavors