I found a supplier for the OEM spiral retaining rings for sanke kegs I refill, but they come in a pack if 25. Would anyone want to go in at $2 a ring ($3+ on McMaster Carr)? Minimum order would be 5 and I would have 15 available.
Forgot to mention that I would need to charge a little something for shipping so I am not losing money. I am thinking $2 should cover sending them snail mail in an envelope. Once I get a few replies I will order them and let everyone know when I should receive them for payment.