You asked this 2 weeks ago...
I was the only one that replied, so here it is again....
"Genuine Mikuni OEM kits, nothing else...several vendors I know carry them, OSD Marine, Bayareapowersports, and Westsidepowersports. "
Pick which one you want, OSD Marine is usually cheaper because he buys in bulk parts and pieces together only what you need....but sometimes shipping can be higher. I've personally gone through ebay and bought with Bayarea, they have good package deals for dual carbs that include needle/seats and base gaskets, and have good prices also.