Copy Pixel Motion vectors?

Hi, I have an idea for an effect, but I'm not sure if it's possible to accomplish in AE. What I'd like to do is copy the Pixel Motion vectors from one clip to a different clip; say I put Timewarp on Clip A, to then be able to apply exactly the same warp to Clip B. I doubt this is even possible, but maybe there's some way to pull it off with more advanced techniques I'm not familiar with.

I hope my description is comprehensible. Thanks to anyone who has any ideas.