I do not think of Red Tiger motaguense as South American. I know to some the difference between Central and S America may seem like semantics, but to me, they are vastly different areas. Water chemistry is often very different, and Central American cichlids have an entirely different aggression ceiling than S Americans.
Although the Mesoheros group from west of the Andes may be in the ball park.
I believe mixing Amazonian S Americans with Centrals often ends in disaster, especially trying to combine considerably mild mannered Geo types with with Herichthyinesor Parachromis.
Also you said you liked the 2nd pic, this is a cool water species, and probably would not be healthy kept in a tropical tank, for those I never used heaters at all.
The bocourti in the photos posted are not S American, they are from the Lake Isabel area narthex border of Mexico.