I tried out one of the canvas ones from Chapters. The kobo touch fits very snugly in; that thing is not going to move out of the case at all. No problems with access to the bottom button. The power button, on the other hand, will give you some trouble depending on the size of your fingers. If you have small fingers or long nails, you probably will be ok. If you have giant fingers, you will to find the opening to be a little too small.
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http://www.chapters.indigo.ca/ereadi...es&ikwsec=Home)