.
It's amazing what you can find out with a bit of persistence/determination - with the help of the internet* ...
As mentioned earlier, my 1.3HF had been owned by its second owner (in France) for 37 years before being sold/exported to a collector in the Netherlands in 2008.
Unfortunately there was very little info provided relating to the car from its time in France - other than a copy of the original French 'Certificat d'Immatriculation' (registration document) with the owner's (then) address.
Although it seemed unlikely that the previous owner still lived at the same address 50 years later (!!), I had to start somewhere, so sent a letter - remember those ?

- requesting any info ...
Although I'd included my telephone number, email address, etc I heard nothing.
I repeated the same process for each of the other addresses I could find for people with the same surname in that area of France - luckily relatively few.
After ~ 3 months I had received precisely
zero responses - in spite of requesting that the recipient of each letter respond via email even if just to say that they were not related to the previous owner of my car. I had even used my 'schoolboy French' to write the contents in both French & English - all to no avail.
I had now exhausted my list of contacts with the same surname living in that small area of France & had more or less accepted defeat when ...
... 'out of the blue' I received a small package through the post bearing a French postmark.
It turned out that one of the letters I'd sent found the previous owner's grandson who, luckily, still lived in the same area.
To cut a long story short, although his grandfather had died back in 2015 he had a 'box of papers' relating to various interesting cars that his grandfather had owned (including several Ferraris) - amongst which were the Fulvia's original handbook (complete with some hand-written notes) & a couple of old photos !
* For you 'younger' members, just imagine what this process was like before the internet ...
.