looking 4 cobra heat mats and ?

im needing some spare cobra heat mats, i did find an online store that had all sizes for like 20.00 bucks and i lost the link, can anybody help me on finding a good site for them. also got an petsmart snake kit, by "all living things" came with a heat mat that was curled in the box, I thought if you bend a mat its heating coils break, anyway heres a link.

http://www.petsmart.com/product/inde...ductId=2752694

PS. this snake kit was a gift, not somthing i would buy

Petsmart has the cobra mats online only, but under the name T-rex. Found that out by accident, but it was a nice find none-the less.