My suggestion would be to have the laptop sent to someone (friend, family), or to some place where your laptop can be dropped and it will be held for you, in one of the neighbouring countries, Chile, Paraguay, or Uruguay, and then mule it in from there.
Much cheaper than a transatlantic flight, and you get to see new places too.
You would need a reliable courier service to handle the transportation and take care of any possible customs fees.
I’m having the brake parts I ordered from the UK muled in this weekend.