Filter Media

[Fishnut]

I'm looking for the foam filter pads.  I need a piece 4' long and 1.5' wide.  This isn't the floss that BA sells in rolls, but it resembles the Aqua Clean sponges in consistency.  Has anyone come across a website or shop that sells something like this?  All I've been able to find is the smaller rectangle shaped piece that is sold by Laguna for pond filters.