Carb choke pull-off - repairable?

[jick.cejoco]

*Pic courtesy of wiki

Take the part labelled D: Choke pull-off

Can that be repaired?

My mech says I have to already replaced it since it's not reacting anymore to pressure.

What's the usual price of a replacement unit? Is it a universal fit?

The one in my basic carb aint working anymore. Consequently, I have to manually "idle up" by giving in more gas and air. Fuel economy suffers.

Can anyone give me an idea of the price?

So when I go look for one I could be sure the shop aint overpricing on me.

TIA

yet another correction:
vacuum operated choke pull off as the name implies is used to pull the choke plate open once the engine starts and pull the fast idle cam to the next lower engine speed setting on the cam. it is the electric bimetallic bourdon spring that is responsible for setting the fast idle screw above the base idle speed