Hi Laurie,
Not sure if your still looking for transfers but what about T-Shirt transfers? You can buy transfer paper that you print on to using a normal printer and and then you can iron the printout on to T-Shirts or in your case the canvas.
I found this on on amazon, looks like some people sell the stuff of ebay too.
http://www.amazon.co.uk/Canon-T-shir.../dp/B00025ZCQK