Expression help for Stereoscopic 3d

Hello,

I'm working with some top and bottom stereoscopic 3d compositions. Top is left eye and bottom is right eye.  My comps have dozens of clone stamps that are drawn on the top half of the comp. I'd like to copy these clone stamp adjustments from the top to the bottom eye and make just the minor tweaks that are unique to the bottom. I can copy all the clone stamp paths, select all the copies and drag them down but that isn't very accurate. Plus I have 110 of these to do. Can I just input an expression that would move all of these clone stamp paths to shift just their Y position value a fixed amount, in my case down 3840 pixels. I tried making a null to parent them all to but the pick whips in the clone stamp "layers" don't seem to want to go to any nulls. Any guidance with single axis specific pixel bulk adjustments would be great!

Thank you,

Ian T.

HP Z820  AE 18.2.1  GTX1060 32gb RAM Windows 10