^^^That's a pretty good idea! And that friends is why I come here.....
Local hardware store has a huge selection of cheap o rings. I'll go and report back today. Thanks!
@Graeme Fraser how long do the o rings last before they need replacing in your experience? (Wondering how many I should buy / keep in my save a dive kit)
It's quite thick and isn't being pushed and pulled regularly so should last at least a couple of seasons. Worst that can happen is it breaks and the D ring sits flat. No biggy and just replace at leisure. Glad to be of service