have you tried an actual lumberyard? they have rows and rows of plywood in diff species and thickness

They both carry it, maybe they are just out of stock where you live. They have SKU#s, just search their websites for the #s.

@Beth H. : yes and all dont have BCX for some reason. It has been fun to search for it :/

@3onthetree: yes out of stock for over 100 miles from my location

Around here they have plenty in stock.