These are the droids, er, shoes you're looking for! They aren't for sale, but you can make your own.

The wide heel of these shoes was removed and replaced with a steel bolt to provide strength and support, but at a fraction of the size. An R2D2 toy covers the heel bolt, and the toes have been decorated with lenses, blue accents, and a blinking red LED to let everyone know just how this droid rolls.

Instructables member mikeasaurus (previously at Neatorama) has step-by-step instructions. Link  -via Geeks Are Sexy