There were some "original" bike racks that fit the VX and VX Kat just bought and sold a couple from Bantan (I think). Don't know how difficult it would be to find them now.

I'm using a Frankenstein type set-up with a universal on the original cross bars that mounts a standard Yakima cross bar above the originals and then the bike racks mount to the Yakima bar. Not the cleanest set up, but it works with the fork mount bike rack from Yakima that I wanted to use (I think they're the Hammerhead's).