OK, finally got an hour to do some work on the lights... bear in mind that I have no idea about electronics, so this is a pretty good effort as far as I'm concerned.
Bought some LEDs from Dick Smith - 8000mcd white ones
Planned my circuit using led wizard (just search these terms in google)
Chose the correct resistors for my circuit, as provided by led wizard
Found a voltage reg to maintain 12V to the leds
Did some pretty dodgy soldering and dodgy looking circuit board work to get this:
Front side on silver painted 'prototype board', cut to fit within the parker section of the headlight:
Rear side with the *ahem* excellent circuit planning and solder work:
It's alive didn't think first go it would fire, but hey, I'm a guru
Looks blue I think because it doesn't have enough voltage... but hey I can live with a little blueness
More to follow around Xmas / new year