Anyone ever had to replace the O-ring fitted to the bleed port bolt on a set of Avid Juicy brakes?

I managed to pinch the ring on one of mine while bleeding the caliper and it now leaks like a b*stard.

LBS hasn’t been much help but they aren’t Avid specialists.

All suggestions gratefully received.

Pinch the one from the bleed kit adapter until you can find a shop with an Avid spares tackle box, they’ve got loads in them, probably because having to bleed frequently eats them alive.