Find missing objects

Hi, All!
I´m having a rather huge problem caused by my lack of discipline.
I’m reviewing some GH definitions from about 5-6 years ago, I open the rhino and GH files, GH tells me some referenced objects are missing… I guess I must have deleted them somehow/somewhen…
The point is I have some dupli-tripli-cuadruplicate files where these objects might be, but when this happens with 20 file-pairs, cross-opening them all would take ages.
Is there a way I can query files for a determined object UID I can retrieve from GH?
I don’t know if I’m the only one with this feeling, but tracking the rhino-gh file pairings over year long design processes is for me one of the very few grasshopper problems…
Thanks in advance!!

I wonder of opening all files, copying all objects to a single one and open the def would work.