The Nissan Path

So I got this situation going on and it's not an alignment issue. I know this because my baby rides true no matter the speed, however 40 - 60 mph my steering wheel develops a case of the J.Fox (Parkinson’s) I talked to a mechanic and he seems to think that I need new tie rod ends? If this is true, if I remember correctly from an episode of Extreme 4x4 I can use Johnny joints for my tie rod ends? I'm in the process of tracking down that episode but I am also looking for some feedback as well. You know pros, cons, good, bad, better solution, wrong problem. You know constructive and helpful ideas, criticism, and or Or what i need to make this happen.