Has anyone replaced insulation above instrument cluster...

Pulled the cluster out of my 71 duster to replace some bulbs and the insulation and a bunch of nastiness above the instrument cluster fell down. I figured Id replace it since I have it out Is there a part number or insulation kit you guys know of that includes this piece? I thought about buying a roll of insulation and cutting it myself but was also wondering What if I just put the cluster in without it?
Thanks heres a pic of it20200731_110800.jpg