I don't know a lot about the RGV forks, I have the GSXR ones. I can tell you this, the calipers are the same as on the dual disc Bandit 400, the brake rotors are the same as well, only difference is the B4's are ventilated and the stock RGV ones are not. I don't know about the wheel, only that the size is the same, 3.00 x 17. I can imagine the RGV has a bigger axle, not sure though.
Good luck.
By the way, I've just read your introduction post, you've lowered the forks almost 20 mm's? Don't you get a very nervous front end? Tankslappers? Wobbles? Highsiders?
I've always had my forks 5 mm's lowered, went to 8 mm's since yesterday and I got my first serious highsider
Now I'm in doubt because it handles great. I hope a steering damper will fix this problem.