I haven't tried or even heard of the Bounce spray. It sounds pretty good.
I have a suggestion for your dilemma with living in Canada. A number of people on the board make their own starch and swear by it. It is less expensive than any starch, including Sta-Flo. Hope this helps. You can always do more searching because there were a lot more listings about starch. Just use starch, corn starch or spray starch for search term.
Hope this helps!
http://www.quiltingboard.com/main-f1...de-t53662.html
http://debsquiltsandthings.blogspot....Spray%20Starch
http://www.quiltingboard.com/main-f1...h-t157146.html