last year I bought a Spacialized Sirrus sport with the disc brakes for commuting. As time has gone on, I realize that I would like some cowhorn bars rather than flats, although Im not opposed to drop. However this presents significant challenges as my bike does not currently have brifters already. I do have Shimano components (I think Deore or Ultegra) and am pretty handy. Is it even feasible to do this? thanks!