How to install again Update Manager after uninstalling it

I tried asking many times on few Ubuntu forums how to deal with my non-responsive Update Manager, but all I was getting was the same stuff (run it from the terminal, run some lines, apt-get update blah blah). Nothing was helping. Eventually I went mad Windows style and tried to simply uninstall it and install it again. The problem is - how to install it again? Can't do it through Software Center, can't really build a package (because I'm too stupid to do that). And I seriously want to avoid reinstalling the whole system.

I am running a 12.04 version (Update Manager was unable to update to a newer one)

Terminal/Konsole:

sudo apt-get install update-manager synaptic

or

sudo apt-get install --reinstall update-manager synaptic

I had a problem with update manager so I uninstalled update-manager and installed again by using:

For uninstall

sudo apt-get purge update-manager

For install

sudo apt-get install update-manager synaptic

And just worked

Sorry for my spelling