GotHeliRC
http://gothelirc.com
We just got in stock a lot of the new size from HQProp, check it out. These are fiberglass mix with plastic to give you the colors of your choice but a lot stiffer than normal plastic. Or if you want ultra stiff, 5x3, 5x4 and 6x4,5 also available in carbon mix.
http://www.gothelirc.com/shopdisplay...258&cat=HQProp
http://www.gothelirc.com/shopdisplay...258&cat=HQProp