Copy directory tree but with most recent files?

Question

Related to my question here force doxygen to pick one from versioned files I'm looking for kind of very simple version control but name based . For sure it would be easier to just use vcs but i want to use it on binary files too ( about 1gb per file ). I just want to backup last version.

At the end I'm looking for something that create copy for following directory tree

rootDir
    -filename1
    -filename2
    -justName
    -otherName
    -dirA
        -dirAFile_ver01
        -dirAFile_ver02
    -dirB
        -dirBFile_01
        -dirBFile_02
        -dirBFile1
        -dirBFile2
    -dirC
        -dirCFile01
        -dirCFile02
        -dirD
            -dirDFile-01
            -dirDFile-02
            -dirDFile.0.1
            -dirDFile.0.2
            -dirDFile.1
    -dirE
        -file1.jpg
        -file2.jpg
        -file1.txt
        -file2.txt

and output should look like this

COPY_rootDir
    -filename2
    -justName
    -otherName
    -dirA
        -dirAFile_ver02
    -dirB
        -dirBFile_02
        -dirBFile2
    -dirC
        -dirCFile02
        -dirD
            -dirDFile-02
            -dirDFile.1
    -dirE
        -file2.jpg
        -file2.txt

Is there any ready to use module that would help me here? I don't even know how to define such versioning approach. Maybe there is ready to use tool ? I wrote simple script in python to create duplicate of directory tree with most recent files (by name), but it's not perfect and there is a lot of exceptions to consider, lots of possibilities for versioning naming conventions. current python script looks like this

import os, shutil
#------
#[return list of words splitted by list of characters]
def multisplit( splitStr , splitList ):
    for splitChar in splitList:
        splitStr = splitStr.replace( splitChar , " " )
    return splitStr.split()   
#------
#[first split by multisplit and then remove any number from string ]
def dualSplit( splitStr, splitList):
    firstPass = multisplit(splitStr,splitList)[0]
    secondPass = ''.join([char for char in firstPass if not char.isdigit()])
    return secondPass
#------
#be sure to use proper slashes]
def ensureSlashes( directoryPath ):
    strList = multisplit( directoryPath , ["\\", "/"] )
    return os.sep.join( strList )
#------
#[copy dirtree with latest files]
def copyLastVersions( source , destination ):
    source = ensureSlashes(source)
    sourcelen = len(source.split(os.sep))
    destination = ensureSlashes(destination)
    for root, dirs, files in os.walk(source):
        similar = []
        for file in sorted(files):
            if file not in similar:
                fname, fext = file.rsplit( "." , 1 )
                fnameOnly = dualSplit( fname , ['_', '-', '.'] )
                similar = [fn for fn in sorted(files)   if  (fnameOnly in fn)   \
                                                        and (fext in fn)        \
                                                        and (len(fnameOnly) == len(dualSplit( fn , ['_', '-', '.']))) ]
                sourceFile = os.sep.join([root, similar[-1]])
                depth =  len(root.split(os.sep)) - sourcelen
                destinationFile = os.sep.join(sourceFile.split(os.sep)[-depth-1:])
                #LOG
                """
                print "--"
                print file, " -- ", fnameOnly
                print similar
                print similar[-1]
                print "source-- ", sourceFile
                print "destin-- ", destinationFile
                print "--------------"
                """
                outPath = os.sep.join([destination,destinationFile])
                print outPath
                if not os.path.exists(os.path.dirname(outPath)):
                    os.mkdir(os.path.dirname(outPath))
                shutil.copy2(sourceFile ,outPath )

copyLastVersions( r"ROOT_SOURCE_PATH" , r"ROOT_DESTINATION_PATH")