Looking for places to buy outdoor fabric

I'm looking for some suggestions on where I might find outdoor fabric. I checked at my local Jo-Ann's store and wasn't able to find anything in their small selection that suited me. I'm hoping to make some new cushions for our chairs as well as some toss pillows for a bench.

Does anyone have any ideas about anywhere else I can look, or an online source where I can purchase something?

Thanks in advance for any suggestions!

I've shopped from these sites. There are plenty more if you do a search for "outdoor decorator fabric".

Denver fabrics: http://www.denverfabrics.com/catalog_items.aspx?TypID=107&Viewby=Types&Page=1

JandO fabrics: http://www.jandofabrics.com/categories.asp?id=14

Fashion Fabrics Club: http://www.fashionfabricsclub.com/search/search.aspx?source=searchbox&keywords=outdoor