I tried the panel type LEDs mentioned above. There isn't much to stick them too in the roof light areas, and I found that after a while the LED panel/double sided tape separated from the fixture. My Patrol is a Y61 - may be different in the Y62.
I now have the ones with LEDs mounted directly on the festoon or globe replacement. Not as many LEDs as the first ones I had, so it is no where near as bright, but still OK.