I have used the HP Satin Canvas too with great results. I also just got a sample roll of some "green" canvas material from a company called Fiber Mark. Their papers have been great, so hopefully this works that way too.
How's the latex stick to art canvas?
Do you need to clear coat it?
We sell a 50"x100' canvas roll that is suitable for latex printers if you want to give us a try. The print results are beautiful and comes with a semi-gloss finished surface. We can offer free shipping to your location too.
http://www.display-wholesale.com/servlet/the-186/Canvas-50"-x-100'/Detail
Warm regards,
-Signworld Team