I've picked up a race harness and sorting out fitment.
A bracket from the US mounts on the rollbar and takes care of the shoulder straps however the lap strap is a challenge.........the floor mounts for the standard belts are concealed below and behind the seats and with the clip on belts there's no way to get them to clip in.
Schroth Racing Competition B23A Dog Bone End Fitting Kit
I've found these online:
but still think that they'll be too short. Any bright ideas to extend the mounts would be great