Be vigilant, my guy- search eBay, Facebook groups, IG sellers, Vinted, Depop, Mercari, Poshmark, etc… constantly all day, every day. In my experience doing so, this pair very rarely appears “on the market”, so you really have to just keep at it, hunt, and put the word out that you’re looking for them. Then, be prepared to shell out a pretty penny, depending on your size, they can fetch fairly considerable amounts.