Cotton squares: Check out a department store cosmetics area. I was at Target the other day with my daughters and while in the cosmetics aisle, I came across a package of 100% cotton cosmetic squares (actually slightly rectangular). They are very compress with 5 thicken ovals to each sheet. I picked up a package of 25 for less than $1.00. I have not checkout their tinder/spark catching abilities, but see no reason once teased apart, that they would not work. Pete