Cheap part, PITA to change.
My (cheeky) advice:
Find a garage not especially experienced with Alfas and get them to fix price quote from autodata (or whatever the software is that garages use in the UK to work out quotes for cars they arent familiar with)... if anything <3 hours labour quoted, snap their hands off.
I did this on my last clutch change, and paid for 6hrs labour on what turned out to be 15hrs+!!!
The garage kept their word, charged the quoted price (and I now take all my cars there for work).