hardware

I’m a little worried about the plastic fin strap retaining pin design. I figure there is a chance it can break, I will break it removing it, or in the event I lose it on the boat changing a strap out I’d be hosed. I’m considering my options since SP told me they don’t sell the pins separately...

Does anybody know of a reliable website I can use to buy these ringnuts to attach to my backplate? I found a couple of websites that may be legit, but both with unsecure connections.