@Valerio I do not have a furling main. In the research I have done to find my new Mainsail I have also read about the furling sails being produced. Regarding the idea of battens or no battens, the new laminated cloths, revised designs, and the furler technology would have me leaning to a no batten design.
As far as sources, I am going with North Sail. In fact I am awaiting the local Loft to send their expert to measure my boat today. Quotes were all over the place. Low of 1,800 to 7,000. North is on the lower end. More importantly, they measure the boat and have a 1 year guarantee (North Sails proudly offers one year of sail care and repair free with the purchase of a new Cruising, Club racing or One Design sail.) A plus, I got a recommendation for the North Loft from my Rigger.
Find a Loft that you can work with. Ask questions and consider all of the ways you want to use the boat. No set of sails can do everything, so you try to find the fit that meets most of your aspirations. Boats are a series of compromises.