I don't know if there is an official way of doing this but you can keep your modifications in your own files without changing those you got from CPAN. 
use FindBin qw/ $Bin /;
use lib $Bin;

use CPAN::Module;
use MyPatches::CPAN::Module; # must comes second

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If you have warnings turned on, you will be notified when a second sub replaces the first.

In reply to Re: Customizing cpan modules by shawnhcorey
in thread Customizing cpan modules by jrsimmon

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