Rich at www.reptilebasics.com also has these amazing heat mats that are supposidly dedicated to reptile use, they get up to 97 degrees on the mat. I have one for my leopard gecko cage i tempgun at about 89-92 depending on ambient room temps. I'm not sure if I'd trust one with plastic but email him and see. Rich is an amazing guy and has excellent customer service.

these are those mats. http://www.reptilebasics.com/ultratherm-heat_pads/

the only reason im not using them for snakes is because i've got a small rack wired with flexwatt and hooked up to a thermostat.