Fitting LEDs

[Spoolio]

What's the best way to do this? I've got an HPI body set with light buckets but all I can do is ream a hole in them and the LED just flops about. No one seems to sell clips that will positively locate the LED so it stays put in a horizontal axis. I have a sort-of solution using a properly Heath Robinson/Top Gear bodge but if anyone has a decent solution I'm all ears.