I don't think such a creature exists.
There are several skippered charters operating out of Pto Montt, I think Dawn Treader ( a member
of CF ) is one, the other I know of is Catch the Wind
. There may be several others.
In the far south the Armada has shut down all the foreign flag charterers and there are only a very few Chilean flag boats still in the business. Unfortunately even if you could find an owner willing to bareboat
you would need to have a Chilean skipper's licence.
Not good news for you I guess but that is the only news I have....