Moving to a South American country, taking pet cat...

A friend is considering moving south as in the title, is devoted to her cat and wants to know- what is the best, most secure cat carrier to use on either a flight or a cruise?
Also, pet supplies and other retail outlets which ship to or operate within modernized South American countries?

I don’t know about moving cats to South America, but I have a relative that’s moved several dogs from South America to the states that may be able to provide you with some help if no one here has any ideas.
I’m sure there’s some differences in going the other way (I have a feeling it’s a bit more lax) but she might still be able to help out with the basics.