Boulder Bicycle has them but they are not cheap. Contact Mike Kone (I have an email address if you pm me). The Campagnolo front part number is 737, the rear part number 738. They are different sizes. I was quoted $48 for a 737 set plus $4 shipping. They occasionally show up on ebay for a little bit less. You may also need bearings and cones if the races are that bad. If you go to the Campyonly site you can down load old Campagnolo catalogs that will help you with numbers.

Pulling them is a hassle. I built a tool similar to that posted above (but cruder). I had the right sized gear puller jaws already, however, that made things a lot simpler.