More seat questions.

[mr402]

Read the responses for bowtieman's post on using late model seats and saw lots of good issues. Many posts made a good case for keeping the stock seat. I'm still contemplating an upgrade but mostly because I want a seat with head rests. After being rear ended and having a sore neck for over 2 years now I'd like a little prevention. Anyone have solid ideas to modify the stock seats to add a headrest? This is one safety feature that no one ever seems to address in any of the seat discussions.