You can use mylar in place of that. Also, I would say it is not even a big deal if you don't get that as even white material is good enough.

Thanks TMG1. I'm actually repairing a room divider I had custom made that is lined with Foylon. The damaged portion measures about 30" (75 cm) square. I could tape or glue on some Mylar or Permaflect -- but I was hoping to get an exact match, because it's a pretty piece of furniture.

Foylon is manufactured by a company called Duracote in Ravenna, OH. You can buy directly through them.