I'm getting a mainsail by C&C pretty soon. So far, Butch has been outstanding to deal with. Be prepared for shortage of whatever type sailcloth you think you might be getting, as availability may change your mind. For me, for the better I'd say.
I would have gone with either Chip at Whirlwind, who seems to be ultra-busy and having difficulty delivering in, what for me is a "reasonable" period of time (YMMV), or Elliott-Patteson, who's also fantastic to deal with. Skip Elliott, though is a wonderful guy, spends time with you, etc. Just he's not local, is a bit more expensive and I think was having difficulty with timely delivery of some materials.
I'll report back with my experience; should have my sail in the next 10 days or so - total, I think 8 weeks for delivery, maybe?
Heard good things about Schurr and Smythe, and have a couple of Smythe sails, which are built really, really nicely.
Chip from Whirlwind made me perfect jib for my Gcat 5.7 when I was on a tight time schedule for Everglades to Key West trip. Was reasonably priced and thats not a common jib make.
I have multiple mains from SuperSails in Fort Lauderdale and they have been good fits. Both are dacron and made from their specs on file, I can only assume they would have good specs for an 18.2 as well.