Hiya fella,
I've just done my xtx, take a look at
www.motrax.co.uk they sell an LED rear light unit with the no. plate light and no. plate bracket for �19.99!! called the LED Cyclops rear light unit.
I made a bracket that fits behind the bottom edge of the plate to carry the indicators, (also motrax-Micro arrow indicators-carbon/irredium �14.99 pr)
Slightly smaller but still legal rear plate, it looks good and the light sits nicely under the rear plastic. Will post some pics when i get a chance, cheers -Micky