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.

However,
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