What can I give to bite?

LB is a biter 😬 We've tried re-directing but he just rejects everything else we give him to bite instead. We've tried teethers, muslins tied in a knot, fruit feeders, toys that are safe to bite, a comforter, breastmilk/fruit puree ice lollies, teething foods, his toothbrush but he rejects it all! It has to be human flesh 😫and usually mine! Is there anything else I can give him to bite?