There is a tear pad in Kmart in the auto section that is a mail off for when you buy 2 bottles of Gumout you get a $10 gas card. These only cost $4 something, so it's a bit of a MM.
I updated the post. I had that the tear pads are in Walmart, but I meant to say Kmart. They cost over $5 at Kmart though, so in order for it to be free, you'd still have to buy them at Walmart.