[Centos] Packages on demmand

Hi all,

I have four servers (one with redhat 7.3, two with CentOS 3.4 and one with CentOS 4 for testing). I would like to do a partial package mirror with os, updates, contrib branches and so on. Anybody knows if exists any tool for redhat based distros, like apt-proxy in debian world ( that donwloads packages on demmand), that supports this feature??

I see yam tool from dag repository, but it needs that do a full mirror ... and I don´t have as much disk space.

Thank you for your

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