Where are you located? In the Chesapeake Bay region, there's Bacon and Associates in Annapolis that sells used sails and they used to sell new Rolly Tasker sails, but not sure if they still deal with them or not. They do have a web site that lists the used sail inventory and the sail dimensions.
http://www.baconsails.com/sailsearchI had a new cruising main built in Deltaville from Ullman Sails/ Latell Sailmakers which I am very happy with. Very well constructed with triple stitching, three reef points, full battens nice leach adjustments...etc....
I would suggest that you get to know a local shop for service and potential necessary tweaking of the sail after testing it out.