My friend Bought some of those for his Honda Accord
( they have the ol` blue Signal flashes for racers as well as amber for turn and white to stay on constantly.
He wanted to have green LEd's instead of blue so I went ahead and replaces those LEd's it's not hard, just take apart the mirror and buy 3mm or 5mm LEDs respectively to fit ( and match up the min and typ current ).
Only problem he has was installing them, they fucked up his stock mirrors by blowing something so now the motor doesn't work for them, and then they wouldn't fit perfectly... so now he has busted stock mirrors. Hope they work for you though if you decide to do this.