Is it possible to make local feed mirror and how could i make this?

You can do this by recursively downloading the feed for your version of OZ from www.openzaurus.org/download (don't know if makes them happy, though...), put it on a sd or cf card and modify the feeds listed in /etc/ipkg.conf to point to file:///media/card (or cf)/path/to/feeds, run ipkg update and you're ready to go