you mite be able to kill 2 birds with one stone. If your seat sucks you mite be able to fix the shoulder blade prob with a seat that will change your position. hope it will help.
+1 on this comment. Personally, the stock seat rocks for me on the FLTRU (and I've had three other HD's before where the stock seats flat out sucked for me). Not sure what you could do exactly to test an alternative before committing to a bar switch, but I would think that there is a chance the seat has you positioned in a way that may contribute more to this issue. That being said, if you're finding no issue w/the seat whatsoever, the only option then is to find a bar to remedy the issue (and obviously you're already getting great recommdations).
I'm 6'3" with 36" reach (18 1/2" neck for anyone wanting to surprise me with a new year's gift!!!). Aside from wishing the bars where about an inch higher, the stock setup (surprisingly) works pretty well for me.
And this may sound a bit odd, but for me this was my first true 'touring' bike. Obviously I don't have a clue of your bike resume so disregard remaining comment if you're a seasoned tourer... But I spent the first 250miles on my RGU actually realizing
I could relax on this thing and enjoy the ride. I was so used to '
driving' all the bikes I had before (I'm sure I'm gonna catch some flack for that comment). I found I was a bit more tense when I didn't need to be. Tension = muscle aches. Just a thought.