I'm pretty sure the 2008-2010 models use a 1157a dual-filament bulb for their front turn signals:It should be pretty easy on xb's 2010 and older, since their upfront "blinker" is on all the time, unless you are turning then it blinks. Essentially replace the wiring with this wiring.
Thanks.Best way I see to do it would be to run a line from teh parking light circuit that feeds a slightly lower voltage to the leds in the turn signal so that they come on but not as bright as normal and then when the turn signal is being used they would get full voltage and brightness. It would only need two diodes and a resistor to build the circuit. The diodes are so that the voltage from the parking lights and turn signals don't feed back into each other and the resistor to drop the voltage coming from the parking light ciruit enough to turn the leds in the turn signal on dimly.