McGee....I have an idea. Why don't you do a little garage gunsmithing - take one of your Hawken clones, cut back the stock just ahead of the butt plate and install spacers and a pad sufficient to retain proper length of pull? That would be less costly than a new rifle.
Unless, of course, you just WANT a new rifle. In which case, you don't have to tell us about your sore shoulder to justify it - we're your friends. Now, your wife....of course, you have to tell her your sore shoulder story.
Whatever your decision, we support you.