AM does OpenEXR with z depth, but storing a 3d object in OpenEXR....?
Both A:M and Maya files are text files. a clever person might devise a translator.
Again, A:M does do OpenEXR with numerous channels. Possibly what you need already.
This sounds like a situation where you would WANT the glow to always be perpendicular to the camera, as real glow always appears anyway.