I replaced mine with this one:

Aircraft firewall material hood liner pad for Mustang, Corvette, Grand National, many other cars: ORDER YOUR HOODLINER HERE!!

The original was rubbing on my airbox and difficult to keep clean...this one is thinner and fits much tighter on the hood since you use adhesive to hold it on and not rely on just the little buttons.

If the forum will ever let me post pictures again, I will put some up of it.