Nokia Lumia 820 LCD replacement, which glue and copper foil?

I (perhaps foolishly) volunteered to replace the LCD on my friends' Lumia 820. I did some research beforehand but failed to notice that the LCD in the phone is glued to a metal plate with a layer of copper foil in between. The replacement LCD I bought does not include the plate or foil.

You can see what I mean in this video https://www.youtube.com/watch?v=CFz3-Hh9...

I wasn't as successful as the guy in the video and completely destroyed the copper foil.

So what I need to know is:

What can I replace the copper foil with? There's lots online but I don't know if I need something special.

What glue should I use to glue the LCD, copper foil and metal plate back together? The research I've done suggests silicone based glue but I don't know which one.

Thanks.