Hello fellow Canadian. Sorry I don't speak French so I'll need to relay this in English. My daughter is bilingual and is learning in both French and English. Nice to meet you.
One Canadian source for hydrogen peroxide is called O2XY-PLUS
It's 35%food grade and is made by a company called Vitality Plus
There phone number is 604 805 1660 and they are located in Langley, B.C
You should be able to find this brand in a health store near you.