Where can I find a good quality tarp?

Looking for one to use for an in camp awning.
Length: 6-8ft.
Width: 5-6ft.

Would like it to easily shed water for occasional use during foul weather.
Grommets should be securely fastened as it may be used in windy weather.

Was considering the basic hardware store varieties and even the harbor freight ones but thought I ought to ask first.

TIA.

Off Roader
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