Whittles had some interesting looking backing, you might take a look at here
http://www.whittlesfabrics.com/cgi-b...duct=Widewidth
I just bought some of the Roclon, $6.50 a yard. I only ordered it night before last, so I haven't gotten it yet. I asked them to send me 3 -3 yard pieces, instead of 9 yards, so we'll see if they actually do it.