Consolidation program

[Dave Smith]

I have a co-worker who has hundreds of duplicate large files strewn 
about his Linux file system, and I want to help him consolidate them. 
What I have in mind is a program that will find all files with a certain 
extension, md5sum them all, and then create a master directory with the 
files, and replace all the duplicates with symbolic links. Does anyone 
know of such a utility?

--Dave
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