I've tried to find some but most bone conduction headsets are made for the athletic market - swimmers and runners - so being waterproof is paramount. Repairability and being waterproof don't usually play nice together. There are only a few manufacturers so there's not much incentive to compete. None were up to my standards. As it stands today bone conducting headsets are just ewaste. The only company I could see doing them well is Fairphone but that's an entirely new product category, and a relatively unpopular one at that. I wouldn't get my hopes up.