Jaycar also has the bitumen base stuff, which you peal one side and stick on, just search CAT. NO. AX3684 (link was too long) it's 2x330 square sheets at $25
I bought 3 packs which only done about half a door each - bottom half of inside door skin and speaker side half of door(R33).
FYI Autobarn sells the Dynamat stuff - $239 for a roll that apparently can do both doors and the boot.