Greenhousemegastwre also has shade cloth in bulk form. It is not finished with tape and grommets but I have been using it for years because it does not unravel and can be cut to whatever size you want. I buy a large piece and then cut it into what I need.
The 40% offers it in 6' wide pieces and 12'. If you want a 12 X 5 it will be about $11.25 plus shipping. The 6 x 12 (there is no remade 5' - you have to use the 12' and then have them cut 5') would be about $14 plus shipping. They are really good quality. I use them every year when I first plant the tomato seedlings here in PA because inevitably that's when the heat hits! Here is a link:
http://www.greenhousemegastore.com/p...shade-material