I have a repair/purchase question. I have this hub

http://www.johnhenrybikes.com/catalo...y=80&item=2039

and need to replace the axle, threads are stripping. I am going to assume that I need to buy a specific axle to fit this hub as when I popped it out I saw it has a metal sleave around tha axle on the inside that I can remove, and need to make that axle fit inside the hub. Any ideas where to buy?