I got the MLV from
http://www.soundproofingamerica.us/
CCF from
http://www.supersoundproofingsales....ick-by-48-wide-per-foot/productinfo/09-42719/
don't recall why I bought from separate places..but both products are very good. Wherever you get your MLV make sure to ask and ensure its virgin material....I've heard the regrind material can really smell toxic.
Both of the materials are 1/8" think...the CCF can compress down to nothing, very light (can grab, stick easy though)...that's why you double it up in the footwells.
1/8" mlv is the ideal thickness for the car....and you would never want to go thicker...stuff is HEAVY....1lb per square foot. For the most part its been pretty easy to work with, just have to take you time cutting to get it to lay down (stuff won't do compound curves. the rear carpet laid nicely in the back area...its 40oz so the weight and the rubber backing have seem to make it pretty easy to get it to conform...once I get the passenger sections complete I'll post some more shots.