Been thinking about this idea for a couple of days. Maybe I could make one? Have to get a (non-vintage) open gear rat, and cut the head off. Then mount it on one of the same company's breaker bars. Cutting would have to be precise, as the pawl spring sits in a hole going into the handle right where the cut would have to be to "flex" it.
Hmmm. Bouncing around ideas how this could be done. If anyone has a Thorsen 3/8" open gear with a buggared handle and a nice, long Thorsen breaker bar that's not being used I'd be open to buying them and giving this idea a shot.
I've got a vintage Thorsen I could trade for these items. I'd hate to cut it off, rather trade for something not vintage.