Need up to date info about Rental Car shuttle from Miami Airport to POM

Can anyone help me with this? (urgently, please! We get to Miami Sunday morning!)

I've seen some old threads and some old TripAdvisor queries about this - we want to return a rental car to the airport and get a shuttle to the Port of Miami.

http://www.tripadvisor.ca/ShowTopic-g34438-i92-k4343300-Shuttles_to_Port_of_Miami_from_MIA-Miami_Florida.html

Can anyone tell me if there still is a free shuttle from the airport to the Port, and what car rental companies take part in it?

(I've tried calling the car rental companies, but I keep getting central reservations and they don't seem to have a clue!)

National, Alamo & Thrifty offered free shuttles to POM the last I checked. If you get a good deal from someone else a taxi from MIA to POM is only $25+tip

Thank you!

Budget and Avis offer a free shuttle to and from POM from their downtown Miami location, not the airport location.