By way of a small update, I've put some LEDs in the front reflector panel:
I had these lying around, so decided to give it a shot. They both look to be a different colour, but they came from the same packet so I'm not sure why that is so. There is room for two more on either side of the Honda badge, so with two more the whole thing should light up nicely. I'm desperately trying to find suitable lights that are not LED; I don't think they look right with the headlights. I was thinking of using four reg plate lights - I need something about that size and shape anyway. Any other ideas? eBay seems to only show up crappy Chinese LEDs.
Overall though I'm quite happy with the result!