Has Paleo Hebrew (Ktav Ivri) Ever Been Found With Crowns? Whether we are talking about ancient scrolls, or amulets, or any type of ancient Hebrew writing.
In short, none have been found so far.
The earliest Ktav Ivri amulets found are the two Ketef Hinnom silver amulets from late First Temple days. A good description of them with pictures showing no taggin is here.
Taggin are not written any of the Ktav Ivri Dead Sea Scrolls(4qPaleo-XXXX, 11QPaleo-Leviticus, etc). A good picture of 11QPaleoleviticus is here, plainly showing no taggin. They are not found in any of their Ashuri tefillin parchments, either.
There may be a good reason for this situation, however - no complete or even incomplete actual Torah scrolls(having all five books and suitable for synagogue use) have been found in Ktav Ivri yet. This is probably because they were buried when they were worn out, and they were all worn out and replaced by Ashuri Torah scrolls sometime between the days of Ezra and the Second Temple's destruction. The Dead Sea Ivri Scrolls are only of one or two books together at most, and the sect followed their own rulings, usually in direct opposition to the Pharisees, who they referred to as "seekers of smooth things". The Pharisee leaders assumed taggin usage was very old, as evidenced by the midrash in Menachot 29b, with HaShem putting taggin on letters and R Akiva explaining them, but by then Ashuri was the standard script for Torah scrolls, mezuzot, and tefillin.
So that's it, none have been found yet, but who knows what'll be dug up next?