Second Life/Opensim Bento BVH Export Add-On

I know there used to be an add-on for the old rigging for SL/OS but seems to have vanished. I was wondering if anyone has made an add-on that I may have missed or plans on making one. To what I see is that when importing to SL/OS, it changes the XYZ rotations to YZX and other then manually changing each one before export, I have yet to find an other way to do this.