FYI. You can substitute a set of EITHER a 10-speed OR 11-speed
CAMPAGNOLO shifters for 9-speed SHIMANO shifters:
If you use an 11-speed Campagnolo shifter, then you would connect the rear derailleur cable on an 8-/9-speed Shimano rear derailleur as you normally would.
If you want to use the 10-speed Campagnolo shifter then you simply need to
hubbub the rear derailleur cable anchoring:
The cost of a set of Campagnolo shifters on eBay will range between about $100 (used in good condition ... you can find new Campagnolo shifters on eBay starting around $150) to $500+ ... let your budget & aesthetic sensibilities be your guide.