Brittle mlok nut - Bravo Company Mfg MLOK Rail QD Sling Mount w/ Quick Detach

I had an MLOK nut that was very brittle and snapped in half with very little torque prior to indexing into the MLOK slot. BCM doesn't advertise replacement nuts and bolts, and I have yet to find a supplier that sells similar sized MLOK nuts. BCM uses larger bolts, leaving less material on the MLOK nuts. Looks like I got one nut made of pot metal, since it looked like coral on the broken edges. I expect poor quality from no-name discount brands, but $19 just for a BCM QD socket I expect better.