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The actual stations are needlessly expensive. Just build something. All it needs to do is hold the cones of your choice at the height and width apart that you prefer, and have something to catch drips at the bottom. You could very easily make one out of wood/metal pipes/pvc pipes/erector set/whatever.
As far as what ceramics to use, Hario and Melitta seem to be the most popular. Chack out the "clever coffee brewer" before you make any decisions though.