Blade is 21" long , 5'wide at attachment end and 6' wide at other end. Hole patten is triangle with 2 3/8" between holes at base and 2 3/4" between holes on each leg . Where can I find? Need 5 ea

Almost any box store sells replacement blades.Sizes vary so you may have to shop around. Home Depot is the place to start Search Results for replacement fan blades at The Home Depot (http://www.homedepot.com/s/replacement%2520fan%2520blades?NCNI-5)