I got mine new from EBay. There is also Tunze Nano Cleaner (you can see it through Google Image Search), similar box, placed next to skimmer. It works independently: surface skimmer, pump at the bottom and filter media could be placed all the way above the pump.
Planning to get it later.
erichatesmice:
Can you post details and maybe photos of silencing? I have other tanks too, and one with overflow box makes quite a sound by water, gurgling down the flexible tubing.
Have Ocean Runner 2500 PH, it is not as quiet, as I would want it to be. What is rubber housing?
You may make a separate thread, if you prefer.
I hope, others will be interested in quieting equipment too.