Could I make or buy a carbon filter like this? (PIX)

BC Northern Lights attach these short carbon filters to the outside of their cabinets and I would love to either buy one or make it. Is it possible?

With a powerful (loud) fan

in the diy section there are several good ones to do it youself, all pretty much the same concept, justs depends how far you want to go, i made a small one and attached it to my htg in line fan and it works wonders