You guys didn't happen to notice if the front door central locking unit is also the same on the Tipo did you?
I've just spent £65 this morning ordering one from Alfa for my '97 P 2L TS 16V, as there are no scrappies near me (Fife, Scotland) that ever have 155's. I know some Fiat & Alfa parts are the same, but without knowing which you, well... don't know.
I might have to replace the front passenger mechanism in a while as well, so I'd be interested to hear if they are the same.
Does anyone have a list of Alfa 155 parts that are the same as those on Fiat models - that would be handy as there's more chance of finding one in the scrappies or getting a (cheaper) aftermarket part.