The best places to look for a job in the area are:
Guatemala and Costa Rica are the countries that I would recommend you to go and look for a job IN PERSON. A phone call won´t get you a job down there.
In Guatemala, go directly to the cafeteria of the Circulo Aereo Guatemalteco, wich is the place where most executive pilots hang out. East side of La Aurora Intl. airport.
In Costa Rica you should go and talk to the guys at Pavas Airport, wich is the field used for light local traffic in San Jose, Costa Rica.
Ahi tienes mis dos centavos amigo, suerte!.