Branford Bike is famous for meticulous Campagnolo ergo lever repair and advice. We now offer the same service for your 2000-current Campagnolo rear derailleur. 
We offer a package price for parts and labor of $88.88, which includes replacing the following genuine Campagnolo springs from our diagram.

Parts: C and M, we also replace the two o-rings on the pivot bolt, which were designed to take the wear and tear of use--not the bolt. Worn o-rings can contribute to "sloppy" rear derailleur action. These o-rings are manufactured and tested to perfectly replicate the original Campagnolo o-rings. 

Additional parts as needed, will incur added expense--we will contact you to confirm any added parts/expense. 

Send your 2000+ rear derailleur to: 
Branford Bike
2404 10th Ave E
Seattle, WA 98102
USA