Originally Posted by
Sheldon Brown
The standard AW axles came in 5 3/4" and 6 1/4" lengths. You do need to disassemble the hub to swap the axle, but this is a lot easier than most people suppose.
See:
http://sheldonbrown.com/aw
Sheldon "Epicyclic" Brown
Do you know what the specs on the axle are? I imagine an axle is a pretty simple piece to machine in any length you'd like