Dyna-Mat

One of the first thing to be done is apply Dyna-mat (or something comparable...) to my firewall and floorboards during re-assembly. Anyone know the square footage for an A body? I'm thinking 100sq. ft. since I need to do the rear cargo area in my fastback. Also, any local guys in the NY-NJ area know of a cheap source for the mat? Online it's about $1 per sq. ft.

Thanks!