If you can’t wait for opentrack to update, you can get the current version of opentrack, and also grab this FreePIE-OSVR thing:
https://github.com/thomasgauthier/FreePIE-OSVR/releases
That can take your vive tracking, put it through FreePIE, which you can read with opentrack. Unfortunately, it just does yaw/pitch/roll right now, no XYZ tracking as of yet.