I’ve not heard of a “creative reuse center”, but if it’s a metro thing, Amazon and Walmart market are used more often by more rural people. As such, the option needs to be browsable and orderable from home. Estate sales, the bid wars on art supplies get crazy to the point of surpassing retail.

Blick prices are decent imo, and I’ve been buying since the 90s. Art supplies themselves, like everything DIY and “maker” zone, have skyrocketed in price, unless you’re going for trash art sets from Ross or similar. The top grade paints and brushes are always ridiculous, wherever you go. Brand matters.

Blick sells canvas by the yard for a good price, it’s my go to for it. Clearance deals are sometimes remarkable.

Other than that, what’s left? Michaels? Hobby Lobby?