There are a number of lofts who can build you a vertical batten sail, mine can from Sobstad Mid west, Rich Wilber is the contact there however if I was doing it today I would speak with Martin at Somerset
Sails in Barker NY, he is the real deal when it comes to experience, low overhead and good prices. Try him on, he is a good guy
Fletch
No it rolls in very nicely and gives a little better sail area, do not think you are going to get a big roach however you are going to get a little positive roach versus a hollow cut.