I don't think there would be any big issue, you'd need to try & see. (if it doesn't work out then just re-install/upgrade back to the current 12.10 package.
I wouldn't use the 12.04 package, probably better to use the last 12.10 avail. before change - source page here
just pick arch & from that page download the .deb's - ex. 64 bit page
There are 5 packages, 3 are needed, the other 2 are -dev & you likely don't need. Also there are 2 add. depends, better to pre-install them, then use dpkg to install the 3 at once.
sudo apt-get purge gnome-disk-utility
Then get the needed packages, put in an empty folder, cd to folder &
sudo apt-get install libunique-3.0-0 libavahi-ui-gtk3-0
So min. would be, Ex. on amd64 install
The 2 -dev packages are as mentioned probably not needed, if installing them then ck. on their deps first, only these 2 are needed
screen shows palimpsest running, no issue here but obviously a very simple machine...
(-if you do be aware of upgrading back