[CentOS-mirror] Mirror Sizes?

I am working on setting up an internal repo (for a couple of tested/stable-for-us versions) of CentOS 5 and 6, and need to make sure I allocate enough (virtual) disk space for it, but I'm not able to find any information on how big the current repos are (without pulling it myself and calculating it).

Fedora has a text-dump from their structure (just the results of a 'du -h' on the tree) - would it be possible for this to become a regular thing for CentOS to do as well? Would help immensely with those attempting to set up a mirror to accurately size them.

Here is Fedora's dump: http://dl.fedoraproject.org/pub/DIRECTORY_SIZES.txt

Here is where they link to it from: http://fedoraproject.org/wiki/Infrastructure/Mirroring

Thanks!

Keith Bachman