Insulating sheet for Hard Drive

I have a PowerBook G4 without a hard drive. I obtained a replacement drive but I had no white-ish plastic sheet to insulate the circuitry from the components inside the body of the laptop, which I'm pretty sure would short something if exposed and in contact with each other.

Unfortunately, I thought of placing a cut piece of anti-static bag under the hard drive, and while I'm not positive this was the cause, the drive was dead (clicking on initialization, no booting) within 12 hours. Sad! So I don't think I can use that method.

Is there anywhere to get that plastic sheet or is there something suitable around the house? Parchment paper, maybe?

I'm really not interested in accidentally killing another increasingly rare hard drive.

Thanks!