I too am looking for a main sail and so far, North Sails in Fla has responded favorably. I've a 36' CS and need a main. I'm a little frustrated as I don't know what to expect and what questions to ask.
Here's the quote I got from North Sails: "Custom built in 8.62 oz Challenge High Aspect dacron to the dimensions we have on file, luff 42.75', foot 12.75', with standard battens and 2 reefs, a new mainsail would be priced at $1,659.
Sail comes standard with leech line with clam cleats at reefs and clew, tell tales, flo-stripes, sail battens and sail bag. Construction is to full offshore specifications and includes triple-stitched seams, large radial corner and reef reinforcements, with handsewn leather chafe protection.
Current delivery time is 4 to 6 weeks from confirmation of order."
Here's a Yager quote: "I just built a new main for a CS36. I used a cruising laminate, partial full battens, three sets of reef points, heavy seams, heavy batten pockets, heavy bolt rope, ready for offshore. The cost to build the sail was $ 2800.00 U.S. If you were looking for something less, leech battens, Dacron Crosscut, it would be less to build: $ 2600.00 depending upon how many reef sets you need and fittings you choose.
I am a custom sail designer and builder. Most of the sails I design and build go way beyond what you get with a stock off the shelf sail."
Local Kent Sails quoted about $2,600 with little detail but I can go to their loft and they can show me.
But an $800 difference is hard to turn my back on! I'm thinking of going to my local loft to gain some education even though with your favorable remarks about North, they're looking pretty good! Thanks for your expertise!