Some kid, on youtube, made a canister filter out of one of these. Idk if you mind spending $20 but it def looks like it will last.
http://boaterscentral.com/otterbox-9...se-p-8650.html
I'm sure there is something out there, for a lot less, if you just keep your eyes open. I'm looking for a nice canister as well. I might spend under $20 but I'd rather it be free

Whatever I use has to be good material.
Keep us posted and gl!
I just saw the dimentions on that canister and its small! There must be other sizes because the one I saw used was fairly large...at least 10" tall
I guess its not as big as I thought.