I've got a few from Kent Wang but another 50 or so that I've accumulated off of eBay over the years. Every year or two I'll run across some who is selling a dozen silk ladies hankerchiefs for $10 total that are really their grandfather's vintage pocket squares. The rest I've picked up for $5-10 including shipping. If you're willing to devote some time to it make sure you also search for: hankerchief, scarf, hankie and "silk square". You'll develop a pretty long exclusion list on your search in short order.