Example: I ordered a bunch of pieces from YSBW on July 8, 2014 and they indicated they had all of it in stock. A few days later however I got a call saying a couple of things were back-ordered and wouldn't ship until the 21st. Today I followed-up and was told the stuff wouldn't ship until the 29th at the earliest.
This is cutting it rather close.
So I called another vendor. Same problem. They couldn't guarantee it would go out before Aug 1. Another vendor checked stock for me and was out of nearly everything I needed. All three vendors said they had seen quite a run in the last 4 weeks.
The moral of this story is if you are thinking of getting canopy parts for this years burn, Git 'Er Dun now or its possible you won't have the shade you want.