Outer Limits 4x4 Board

Has anyone found a suitable replacement material for the heat shield on the inside of your bonnet?

I have had to cut away some of mine and want to replace it so the paint doesnt go flaky.

I was thinking of some 2ich silver sided insulation that I think is used in airconditioning and refrigeration?

Thanks

You can buy sheets of it from Bursons. I got some from Rare Spares, but they probably don't have as many branches as Burson's do.