The Canadian Tire in Red Deer AB sells the swinging type, gophers and whatnot. Also, Wholesale Sports in Edmonton sells the same. I use a gopher for rifle target practice. When I shoot with my wife, she enjoys the reactive targets a lot more than hitting paper.
I haven't seen any that would work for IPSC type stuff. I wonder, it shouldn't be that hard to make them? Anyone ever seen a recipe for the self sealing polymer? If you could mix it and pour it into a pan you could make your own... I wonder...