I really don't under the why of what you are trying to do???

If you don't care about the navbar, then just do a save as a new name, and
delete all the pages except the one(s) you want to save. Repeat 12 times.

If you want the navbar, then open another instance of Publisher, select all,
group, copy and paste the page in the second instance. Repeat 12 times.

Perhaps just do a save as for the whole Pub file and save that for backup.
You can always pull the content off the individual pages if you need them.

Once again, I can't envision your goal or why you would want to do this, so
if these approaches don't get you there, post back with a better
explanation.

DavidF