This is a long shot but I thought I'd ask if anyone has the Plastic Nut that holds the Battery Earth strap onto the tie-down (circled in yellow below). Ignore the aftermarket battery bracket, it was just the best picture I could find.
I'm missing mine and it's only available as the whole assembly with the battery cable from the dealer (which is $$), and no wrecker seems to want to bother with such a small part.
I'm happy to pay for someone's time and effort if they have access to eg a local wreck. I've tried and had no luck.
.