Tri-chem products (or something similiar)?

I have had an urge to use fabric paints, along the lines of tri-chem, and have found that I can purchase the paints at AC Moore, however, I cannot find the preprinted swatches/felt pieces anywhere. Does anyone know if I can use any type of preprinted cloth material for these liquid paints in a tube or do I have to use a specific material for them. I'm hoping someone understands what I'm talking about. If you can help it would be greatly appreciated. To see the type of paints I am talking about you can google tri-chem paints and it will take you to the link I had been to a few times. Thanks in advance for anyone who is able to help.