update imported graphics - scripting/addon solution ?

[Studio Smalbro]

I need to check some thousand framemaker files for newer versions of 
imported graphics. Each framemaker file has one imported graphic and each 
framemaker file bears the name of that imported graphic. The graphics are 
named consecutively, so that if a newer version exists it is named with a 
higher number. I would like to be able to find some elegant way of checking 
these files for newer graphics. Is there a plugin that would facilitate this 
work or might it be done using scripting ?

Best regards
Bjørn