Foam blocks

[pm]

Does anyone know where one can get a large block of aquarium safe open cell foam in the Ottawa area?  I am modifying an old Magnum 350 filter, and I am looking for something similar in density to an aquaclear sponge.  The sponge for the larges aquaclear might work, but I would prefer something wider and not quite so long.

Any ideas?

[washefuzzy]

You can cute pieces of the aquaclear foam to make it wider and shorter.

[Brine]

You can get the ones for a pond filter and cut them to size....they are large. They may even be on sale at this time of year