You have some very good answers here. What are you going to make? H&*
I have bought mine at Wal-mart, Joann's & Hancock. I like the shower curtain idea, sounds very economical.
If you have a WalMart close to you that still sells fabric I bought mine there. My friend went to Dollar Tree and bought the Clear shower curtain - and it is working beautifully - she has enough for several projects for only $1