We have these guys in NJ as well; evidently they spawned off of a school in Staten Island.
http://www.njvadhakempo.com/main.htm
Be warned -- the music they play in the background is both loud AND annoying.
I do remember reading somewhere where both the Vadha people and the Vadha Kempo people were trying to distance themselves from each other, saying that the styles were too dissimilar to share the same name. On this guy's website, he does at least mention that Vadha Kempo is a "hybrid" art, incorporating a whole bunch of other things besides Vadha. There's another guy in NJ who teaches MMA that also uses Vadha Kempo as his base.
From what I've seen (plus what I've read here), about the only thing VK has in common with AK is that they wear black gis.