Try "Shelpi" in the VMX sidecar area I will look in my mess tomorrow as I remember having a set or two some years ago, of that era, Suzuki twin long intake bell type Mikuni's. but it was many moons since a have noticed them
tis true, but if I may give some advice, buy new spigot types carbs with rubber mounting flanges, 1st get the SUDCO Mikuni 5th Edition tuning manaul
Even if one of us flog you a cheap set of old flange (do them up to tight then the throttle sticks wide open) types then ya probobally gunna need to full rebuild and that will costya, then fiddle fu#k around with those stupib idle screw thingy's on top of the carb, I could go on and on about them if ya want