1972 450sl firewall insulation
 

Is the material used for the insulation on the firewall available? If not what would be a good substitute, I have not found any source so far, all the aftermarket sound deadening pads that seem to be the right thickness have foil coverings and I wanted to stay as close to original as possible.
Thanks alot.

Check with the Classic Center. They can tell you if OEM is still available.

http://mbca.cartama.net/forumdisplay.php?f=84

Not cheap!

Type in firewall in the first search box.
http://www.parts123.com/parts123/yb.dll?userwatch~dynamicSearchPage~cadehfjA

That is more than dealer retail. Try PN 1076820126 here
http://www.trademotion.com/partlocator/index.cfm?action=searchCatalogOEM&siteid=214660

thanks for the info!