The tail lights of the 2008+ Tribute and Escape are the same shape and size. Mariners are a little taller and dip into the bumper and as a result will not fit without some modification or bumper swap.
As for aftermarket stuff, there's nothing to my knowledge. I am in a project of using the LED tail bulbs out of the Mustang/Mountainer/Sable//Malibu and installing them to my car's tail lights. Other than that, it's really all creativity.