broken Campagnolo Shifter paddle

[ntb1001]

So today I took out my bike with Campagnolo Record 12 mechanical with hydraulic disk brakes.
This a bike I not really ridden much past two years, I was actually selling it tomorrow and took it today just to make sure its all adjusted well.
During the ride, I stared having difficulty shifting gears, both front and rear.
They felt locked and woukd not change. I kept working the levers until they responded a bit, but still did not shift prperly.
I got home and sprayed inside the levers with soem WD40, and that seem to clear up the right hand lever and started shifting better.
On the left lever though, I was pushing the shifter paddle, and it snapped off.

Do I have to replace the entire shifter. or is the paddle replaceable?