ooooh, bummer man... Sorry, but I don't think that anything below AE 5 is supported.
And I hate to say it, but I don't know of any 3rd party plugins regarding Maya cam data import.
One thing you CAN do in this case is to duplicate your Maya scene, and add small, contrasting-colored dots (poly plane) in a non-detailed render in the locations of where you want your AE extras to be.
Then just track those markers in AE to gennerate your data that way.
Just an idea
Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS