Sled covering Non stick

Hello, can anyone suggest a decent media for covering sleds for laminating? Looking for the best silicone -like, non-stick surface. My old supplier changed manufacturers and the newer product is sub-standard (everything sticks and I have to resurface sleds way to often) I was using a white graphic mount that had a waxy release paper that WAS ideal, but I cannot get that product anymore. Thanks in advance for any suggestions : )