Maybe these links could help you with the Panama to Columbia ferry crossing :
https://ivssuk.com/shipping-across-the-darien-gap-panama-to-colombia/
http://www.drivetheamericas.com/vehicle-shipping
Here is a step by step account of someone who has done it:
http://www.infinitejuice.com/2016/12/02/shipping-your-car-from-panama-to-colombia/amp/