I checked the online Canex store and they don’t have any Red Berets to buy. I’m not sure if this because they’re out of stock but here’s a website to get one.
http://www.valleycombat.com/gi-style-red-beret-p/uf4901.htm
Nick’s Sports Shop (Yonge & Wellesley) has Red Beret’s as well.
http://www.nickssportshop.ca/product/assorted-berets-used/