Where is best place to get blind grass and wind proof sunshade material for my blind frame?

Jstern for raffia and ebay for cordura fabric of your liking

I use sand blasting screen/ tarp from harbor freight. It's cheap and makes really good backing . I then use fast grass and use grass and brush from the marsh near our lease.

Silt fence is another wind screen option

Where are you located?? Unless you own a snow blower it probably doesn't get cold enough to need wind backing, put on more clothes you wuss.

Looking more for thicker grass look, not the raffia stuff. Found it on eBay in rolls. I like the heavy windoroof stuff just seems more durable, I'm not much of a wuss