Embossable plastic sheets for card making.

Hi All - I just watched a demo and the instructor
embossed on a heat resistant plastic sheet and used it
in the window of a card. The plastic is supposed to be sold by Judikins. I cannot find it anywhere. She also
used plastic laminate sheets. If anybody know whay I'm talking about and has any input I would SO appreciate it
if you would drop me a quickie line. Thanks much.
Annie