Originally Posted by robertjinx
but I believe you'll find all the rpm's in
/var/cache/yum/updates/packages, but I'm not 100% sure.
I can confirm that. However I doubt that yum has kept the downloaded files, since the default behaviour is to delete them after the installation. To keep downloaded packages you have to edit the file /etc/yum.conf and in the [main] section add the code:
@LinuxLover: following the suggestion above you can keep at least the package from one of the two remaining machines, then update the last one by setting a local update repository.