Well Barlows and livingrubber.com only has the round rubber as well as staminainc, but staminainc is a awesome site that I didn't know about and will be buying from. Some one probably has a ton of this stuff in their basement and just doesn't want to get rid of it, but again what I am looking for you will probably not find in any store. It is the flat or square living rubber that is the regular style cut. It used to sell for about $4.00 for 15 foot, and I would pay a lot more for it now, so let me know. You might make some money.