The title describes both what I want, and what I've become. :)

I've now broken two smog pumps, both in a non-trivial manner. The first one took out the belt (overhead the field, thankfully).  I fitted a disconnect so the clutch was held in with a vacuum switch. The second one failed (on the ground) and causes the pully to lock up even when the clutch is disengaged. Not good. It's time to loose the vacuum.

I need an idle gear to replace the smog pump in the belt path. I've searched for eliminator brackets, but can't find one for an RX7.
Any suggestions?
Regards,
John Slade