I get mine from heirlooms by Sharon, send her an email to ask about shipping prices to Canada
Hi Lucy Nancy's notions sells individual colors or a variety pack. They work well! here is the link. Suzanne
Many of the online store sell it, try googling mylar may be they list some stores on the description sites..
I bought mylar at a quilt store. I have tried using chip bags, and found it broke up in the embroidered design. Chip bags did not work well for me.