We don't have the Pathfinder Battles bases, but Reaper Miniatures has a whole bunch of bases for you.
Check out Litko too, I believe you can order customer sizes too, with several materials, slotted or not and in a couple shapes.
I really wish Paizo would consider selling bases, and I have also suggested in the past as well.
There is no one selling bases that resemble the Paizo/WotC bases. All other bases on the market either are angle-bevelled, slotted or have a textured top.
I have been using Litko bases for now as they are the closest, but the finish is so sheen on them, that they easy show any marks or scratches.
Not sure if these are beveled or not, but this has good flexibility.
http://www.litko.net/BMaker/
awesome. thanx lorian:)