Keep in mind too, once you've decided to do something different with the gauges, you really open up 'bar options. Near as I can tell, the Rocket has the same 100mm center to center distance on the risers that Honda and Yamaha do. This means there are many, many, T-Bar options available in the $110 to $180 range.
Has anybody measured Rocket riser bolt size and compared them to Honda, or Harley for that matter? If bolt/stud sizes are compatible that greatly expands the riser possibilities.