Originally Posted by
queerpunk
you can order a new axle - and it doesn't even need to be from campagnolo. as long as the threading is the same, you can get it as long as you want, cut it to length, clean up the threads, and thread your hardware and wheel on to it.
If you know what threads you need then check out McMaster Carr; they sell metric threaded rods, both fully threaded and threaded both-ends, using high strength steel. You may find something you can use.
https://www.mcmaster.com/threaded-rods