There's a vendor on eBay based out of Canada that specializes in 2 & 3 layer ESD mats, bags, and other such products (
canvu0_0). The mat material he sells is from Scientific Americas, and according to a PM I received, is made in Canada. He offers all kinds of sizes (will also do custom sizes if you PM him), different colors, and even different surface finishes (smooth & textured).
FWIW, I bought a 2 layer mat from him a few years ago, and it's been an excellent performer.
I'd buy from him again at regular street prices, as he's cheaper than any place else I've seen (only time I managed a better deal on a mat, was on a clearance item from All-Spec).
As per what you need for ESD safety, a mat and wrist strap will do, so there's no need to go nutz.