One day out of curiousity, I pulled apart the rear wiper switch and discovered a itty bitty bulb inside. Lordco and NAPA didn't have anything to fit, but I figured that any 12V micro bulb and a bit of jiggery pokery would do, so off I went to the local Radio Shack (I refuse to call it by its new name!)
After a bit of rummaging, I located a pair of 12v 60mA wire based bulbs (#7219) that looked to be about the right size. I got home and started dismantling the rear wiper switch:

The white rectangle in the middle is a rubber bulb holder. Here is a size comparison between the old bulb and the new one:

The bulb wires are looped around through it. here is a shot of the hazard switch's bulb holder with one of the wires partianlly unwound. I was having trouble focussing n the white one:

Once the new bulb is in, just press fit the rubber holder pack into place, reassemble the switch and put it back in the dash. Once that is done test the lights and then bask in the warm green and red glow, or go grab the wife (or kids, neighbour, the family pet) and show off your skill and savoir faire!