Tank divider, what and where to get?

[seahorsecanada]

I have a 48-inch long tank and I would like to divide them into four smaller ones. (like those we see in the local fish stores sometimes) Could anyone give some advices on which material I should use and where I can get them? I want a non-transparent ones so the fish won't see each other. Thanks for any help.

[ILIKECOUGARS]

Petsmart sells tank divider here, they are white with tiny holes, the fish won't see each other and have bracket to mount in the tank.