For anyone looking for Quad Lock parts, I found this guy on ebay who has some really good prices. I contacted him looking for some things that weren't in his ebay listings and (breaking ebay's rules) he had me contact him directly. I was a little bit leery of it but it all worked out. I paid via PayPal and he shipped very quickly (although his ebay listing says he ships on Tues & Thurs).
I don't know how he acquires the stuff but I'm guessing it might be returns/open box? With my order he told me some of the boxes might not be perfect (I didn't care) and for one of the things it just came in a plain plastic bag (again, I didn't care, it was a plastic spacer and some screws).
Here is a link to his ebay listings. You can contact him via ebay if you're looking for other things (he's told me he has "almost anything, and, so far, he has). I told him I'd mention him here and he said not to post his phone number publicly online but I have it and can provide it via PM.
I have no connection to this, just wanted to pass on a good deal.https://www.ebay.com/sch/i.html?isRefine=true&_pgn=1&sid=texaslover20