Why not just get something custom made? or drill out the stripped threads and use a through bolt with a bolt on the outside?
I did think that too, you could make it look okay with a stainless socket screw, nyloc nut (if you're feeling OCD) and washer. Change out of a quid.
@BernardRenault started
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Why not just get something custom made? or drill out the stripped threads and use a through bolt with a bolt on the outside?