Where you based mate? got a massive peice of bog wood here, think it may actually be a root of a tree or something, brought it from ripples for £150. must be about 20" tall, 36" wide and maybe 8" thick, £50 if you want it mate.
No worries mate, its not in a tank atm as its too big for our small 125gallon lol!
if you change your mind though, im sure it will still be here when your tank is fully up and running!
Awesome tank though! wouldnt mind a big tank like that, but i think id rtaher for for small 7ft long but with say 4ft width and 3ft height. though, but each to their own.