If all you need is bearing replacement, any competent bike shop can do
this. Better yet, you can do it yourself for about 2 dollars worth of
bearings and grease and 15 minutes per wheel - use Lennard Zinn's book
or Parktool website along with exploded pparts diagram from Campy
website (or manual which came with the wheels if you still have it).
If you need small hub parts other than just bearing replacement, you
can find the exact part #'s on the Campy website going well back into
the early 1990's. Good Campy small parts sources are Oschner (http://
www.ochsnerusa-store.com/index.php) and Branford Bike, which is back
in business after moving and having a fire. Another alternative if you
need parts and don't want to do the work yourself is to find a Campy-
certified shop (check their website) or contact Peter Chisholm
(Vecchio's Bicicleterria in Boulder) whio is a frequent and generous
contributor to this NG.
No reason with routine maintenance that you can't get multiple tens of
thousabds of miles out of these wheels.

Good riding............Lou D'Amelio