Try this
https://edtracker.org.uk/
If all you need it for is elite then it's perfect. It doesn't do 6DOF but the elite doesn't support that anyway. I've been using it for a while and it's great, I have literally no complaints with it. And at £40 it's a helluva lot cheeper than Track Ir.
I actually had this and it worked okay, but it was wireless so i wired everywhere lol.