Thank to all who contributed.
I just downloaded from http://www.tracksource.org.br/
The site is in Portuguese but the maps work fine, downloaded installed in Mapsource and uploaded to my Garmi 60Cx, works fine. Remember to rename the existing gmapsupp.img before uploading. If you have the memory you can keep the files on the GPS and just rename when you need them.
Now trying Venezuela map, then look for Colombia .. all soon to be destinations.