A veritable BARGAIN in Campy-compatible spare parts :
$4.50 for a Taiwan-made M10x136mm or M10x141mm complete rear axle set. I have one of these (bought at LBS), and they look a lot like campy, except no axle keyhole and the spacer is yucky heavy milled steel.
http://www.loosescrews.com/
Aluminum spacers of all size, 1mm - 12.5 mm, campy available, top price is $3.35 for the true campy spacers.
So you can put together a very "campy-like" rear axle set for $7, plus shipping fees of course.
- Don Gillies
San Diego, CA