In case you haven't seen it...

[Pescador]

These are the ones I was looking at last year, kind of the same idea.
http://www.3d-aquarium-backgrounds.c...y/prod_11.html


In Taiwan they had some plain black molded foam reef backgrounds that were cheap and looked awesome once they were covered in coraline. I was already over limit on my luggage. I should ask the Brother-in-law if he could track them down.