Need to reinstall unix head utility any ideas?

[Boysenberry Payne]

I made the mistake of installing LWP before I read a snippet in the
http://www.modperlcookbook.org/chapters/ch01.pdf
section 1.9
now my original head utility was overwritten by HEAD and I need
to get it back to build mod_perl 1.26 from source.  Does anyone
know where or how I can reinstall this file?