ceramic source?

Does anyone know of a source for hydrophilic porous ceramic disks that allows you to buy in small qty without charging an arm and a leg? I want to do some testing but am having trouble finding some of these... an example of one place that has them (but is a wholesaler in large qty) ceramic disks and such
I am particularly interested in pore sizes of 2 microns or less with a flow rate better than 5ml/hr/cm2 at 1 bar pressure.

Perhaps Edmund Scientific or some other vendor for HS and University lab equipment.

E&K Scientific Products, Inc. 800/934-8114 If reception hassles you, ask for Lisa Blair, ex 103 she and I were at the Toronto Rolling Stones concert, tell her Mike sent me.... <img src="images/graemlins/blush.gif" alt="" />