Flanders "Beach" bars #650-08511 from
WWW.Flandersco.com will fit with some modification. I went through three sets of bars before I found just the right fit with enough pull back to improve the reach problem. The Beach bars are the same type that is on the M50 but you can order different sizes. The cables and wiring on the M50 limit the amount of pull back, height and width of any replacement bars. This set of bars have 3.5" of height (same as stock) pull back of 10.25 inches, and width of 32.5 inches. I still had to cut one inch off the ends of the bar to keep from stretching the cables and hoses too much. This made a big difference in riding comfort. You might also consider a drivers back rest from Lonnie(bf4cm28@yahoo.com) The mounting bracket can be bent slightly to position you closer to the handle bars. I hope this helps. J.Sam