I find the CPAN search feature to be useful for this. For instance, try Cache::SizeAwareFileCache and you will see that it extends Cache::FileCache, which in turn is cart of Cache-Cache.
-Mark
Comment on Re: Finding CPAN modules from module names
Thanks -- I have a list of 49 modules and I was hoping for some way to simplify and/or automate the process. I guess I'll just go hit the CPAN site a couple of dozen times now.