I am looking to custom order some printed icing sheets for my B&B business. I can't find a supplier, just suppliers for the printers, inks, etc. Any one know of a Canadian supplier? I am tempted to order all the materials and start a mail order business myself, something I've thought of before.

Check Ebay I have ordered them from someone on Ebay and they came from Canada.

Have you tried your local supermarket bakery? We have a few around here that you can order prints from (ie:longo's, fortino's etc). Prices vary. Not all will do it though, but they will know who does and should be able to refer you.
Not too sure if this is what you mean or not, sorry.

HTH