Basically print in the flexible filament of your choice.
There are two sizes, A large version and the Keyfob version which is 30% of the original size. The keyfob version has been optimised for the smaller scale so the model is slightly different (Hole size, thin walls etc)
I include my Craftware settings and project file for both versions which you can import into Craftware from Craftunique. My new slicer of choice,