http://www.epson.com/cgi-bin/Store/ProductMediaSpec.jsp?BV_UseBVCookie=yes&infoType=Overview&oid=-11182&category=Paper+%26+Media

Here is a starting point for the USA.  There is no doubt a huge amount of printing on canvas is done--even Art students are doing it now. I see only 44 inch wide is being listed--mabe still to come for the new 60inch printers.(Though you should be able to feed single pieces cut to size from the art shops.)

Glossy finish--go over it again with a clear semi matt finish.

http://www.epson.com.au/prographics/products/largeformat/DisplayMain.asp?id=styluspro11880
About the 64inch printer

bwtr