Bed Bath & Beyond offers the Oxygenics Star Wars R2-D2 Fixed Shower Head for $9.99 plus $5.99 for shipping. (In-store pickup may be available in select locations.) As the best price we could find by $4, this is the droid you're looking for. This 4"-diameter shower head features three spray settings and anti-clog nozzles, although it lacks R2's arc welder, which is probably a good thing in this case.