Hasta La Motion!

I have this sequence of a creature that I want to add motion blur to it. The thing is I don’t want to use the beauty pass I want to create the passes in post and edit them till I am satisifed.

The motion vectors are rendered out of Maya using the toxik preset I have no problem with this as I have had correct results with beauty pass and motion vectors straight out of Maya.

But here lies the problem, the majority of vectorblur solutions are very simple usually rendering to exr in the same file, and considering that the beauty pass that also contains the motion vector file embeded in it.

But I have a composite that I have created from scratch and have added all the layers together creating my own beauty pass but when I add the motion blur using the vectorblur node and shuffle copy it cannot find the toxik motion vectors, not sure what to do?

My motionvector is rendered into my color pass, motionvector is toxik preset with correct shutter settings.

Looking for advice on this matter of integrating vectorblur wihin the node tree of my composite.

Thanks