Please note, this page only contains the discs available in the 18mm size. Because of the small size, some of the more detailed discs (e.g. Reindeer, dolphin etc) are not available, as when tested they would not extrude well enough to give satisfactory results.
There is an extender available for the small extruders that allows larger 24mm discs to be used, which opens up more possibilities.
The extender is called the 'Walnut hollow clay extruder adapter' I have no affiliation with this product, so can't offer it in my shop, but the name should hopefully locate it if you are interested.