I know with DR you have to aim in certain parts for the decap / cut in half but does vanilla have location awareness?
Nope, head shot's as good as a foot shot, unfortunately.
I did a search at nexus for "training dummy" and came up with only two files.
So use different search terms, like just "training," "dummy," and try "target," "marksman," and "archery." Basic search stuff.
I think http://www.tesnexus.com/downloads/file.php?id=27259 is the one that makes all targets usable.