[pikeman]

You could also try a wrecking yard, and yes, look for an MX5 cap. Not certain but I’d suspect even one for the NB might fit.
best regards
Pete

 

[pikeman]

This sounds like a job for Fiat Cares. They are on the forum.
Pete

 

[pikeman]

I’m sticking this thread. This type of problem is nuts. Maybe I should buy one just in case. And evidently “Fiat Cares” is on siesta.
Best regards
Pete