ever considered E-bay? Another choice, if your not completely stuck on malaysian driftwood would be manzanita.com for some manzanita, you could get a pretty good ammount of varying peices, sizes, shapes somewhat taylored to your requests for roughly the same price as a peice from Aquarium Adventure, they really get ya on hardscape and decorations there.
I can't tell you how many times i've looked through their bins of wood only to be turned away by the price and lack of peices that suit my taste, but I still look every time, who knows why.
I Hope that helps a little
