Q on Zipp Vuka bars (et. al)

There's quite a few options now for an "integrated" base bar/aero bar combination and I'm looking at a couple of them, but generally along the lines of the Zipp Vuka bars. I know that they offer different lengths for the bars, but I wonder if there are different sizes for how far the aero-bars are from each other? That's obviously not a problem with clip-ons, but with the integrated setup does this become a concern? I have looked at the Zipp web site and it looks like they only offer one size and you can adjust from there, including the arm pads. I'm a Clydesdale rider (46" chest), so I wouldn't want something too close together - would adjusting the arm pads offer enough width play to be comfortable on them?