There's a place in Fonthill (about 20 min from niagra falls) where i'm going to pick some up. Damplifier is about $3.50 / sq ft. Oh yeah, anything that comes on a "roll" or is rolled up, isn't meant for cars, it's meant for roofing. If it comes in sheets, it's meant for a car. I've learned that in my searching (dynamat extreme and damplifier come in sheets) The b-quiet stuff comes in rolls (made in alberta) .
Here's a cool site:

89 4Runner
3" BL, M/T locks, 33"bfg mt, bilstein, Kayline, tubebumper, toyotafiberglass panels
TBI: Elocker,3.4 w/ORS,b+b,S2Sstg2cams,arias pistons,P+P intake,TRDs/c,URDpullies+7th,downey headers,MAPECU2,WEGO WB, SupraMAF,walboro255,stg4clutch, EPaOo2 sim