Use your desktop publisher and printer. Lay out the net of a cube (six squares arranged like a Christian cross) and paste suitable pictures on each face, print it on cardboard, cut it out with tabs on the sides of the squares and fold and paste it into a cube.
The advantage of making your own, as well as having exactly what you want on it, is that if there's one thing you like best you can glue a little weight inside so that the one you prefer comes up most often. Or you can glue a =big= weight inside, so that the first time you roll it your victim can see that you're not playing fair, and what can sie do about it? :>