Recycling climbing holds

I run a small climbing wall at a university in North Carolina. We have a selection of holds that are no longer usable (blown apart, broke in half, slopers that now look more like pockets, etc.). Does anyone know of any companies that will recycle old holds? Typically we sell/donate our used-but-usable supply. I'm just trying to figure out what to do with the unusably broken ones. Thanks in advance.

try nicros or metolius...i know they have a broken hold return policy. Though once the resin is cured its good as done - cant really use it for anything else but filler maybe

so many different chemicals, resins, materials used I doubt if many places can reuse all of them. Sad to say when they get that bad, they probably go to the garbage dump. My old holds have a problem on my outdoor wall, of freezing/rusting in place on the t-nut, and when the board rots out and the hold pulls off, I can't get the nut off the messed up hold, so most have been going to the dump after that. But I've gotten 24+ years out of some of my holds, and still counting on some original ones I got back in '89 from companies that don't even exist anymore.