Hi Larry,
Sorry to hear about your incident but glad you're O.K.
NorCal uses the SFI 37.1 Safety Solutions C5R right side net.
We mount the front strap to the roll cage knee bar and use collar rings to prevent it from sliding. Our cage builder TCDesigns has been fabricating this in the recent cages in built. This is what he did in Aubie's (NorCal #27) car.