Insulation for the interor over the transmission

[Dreroman]

I am currently working on restoring the interior of my 1985 Pinna. I have used Hustmat under the carpet area and over the transmission well. However, I am concerned about the heat that usually comes off the transmission while driving. The original insulation was much thicker. I was wondering if anyone had thoughts or tips on insulating this area better before I put the carpet down.

Here are some photos of what I have done so far: https://photos.app.goo.gl/t286Rc1i6iTcp2ua7