Original sound deadening on front footwells

I need to remove original sound deadening from both front floors to carry out a repair , i intend to heat it up and scrape off unless anyone knows of a better method.
Main question is where can i buy it from as i want to replicate it and cut to shape before i remove old stuff .
Thanks in advance sam

Freeze it and snap it off

Replace with dynamat

warm it up with a heat gun get your nails under it an lift it up it takes a while but you sctrach your floor but you will burn your hands

I just heated mine up and scraped it off and I'll be replacing it with dynamat, or similar.