Mk1 puntos are now very old. The foam between the cone and the speaker frame breaks down after a time even if not used so many of these, even a "new old stock" speaker off the shelf of a warehouse somewhere is likely to be useless now.
As this is an unseen part, you can easily buy replacement aftermarket speakers on ebay. or if it has to be a fiat item then look for an alternative from another fiat car like a panda or newer punto.
The part number on that picture does not appear to come up on
EPER,
But you can search for the correct part number for your car in
EPER, you could start by looking here
https://eper.fiatforum.com/en/Drawings/Detail/F/F/FPUN/1A/555/21/0/0/SubSubGroup
This will give you some idea of the part numbers to try looking for on eBay.