Good info, folks, thanks. One problem is since they are remote, if there's a fit problem, that's a problem. Local (Annapolis) sailmakers want more $$ but are local.
Unless you are dealing with a small loft that builds their own sails and not a name brand, the sails are being made overseas, China, Thailand, South Africa, Sri Lanka, and probably elsewhere.
Ask the loft where the sails are made and who makes them. Then do a Google search on that loft. You'll find interesting information about the sail making industry. Quality control is always an issue. The offshore lofts will have a primary major brand and then they make sails for other brands. The loft that makes Great Circle Sails is also the primary loft for Ullman. So you can get Ullman construction quality for less money because GCS doesn't have the same marketing costs.
A good loft, even the non-marquee lofts, should provide support, but it may be via email and photos and not on-the-boat support. If there is an issue, then the loft should stand behind it.
Another loft to look at is
FX-Sails they have been around awhile, used to be known as Air Force sails and were affiliated with Sailnet.com (remember them?). Apparently the loft owner once worked for Elvstrom sails. Elvstrom later merged with Sobstad (?). If I'm correct, then the pedigree for FX-Sails is good. Brian Hancock from Great Circle Sails also learned the trade from Paul Elvstrom.
Another place to look is Mack Sails. They are US made in Florida.
Good Luck!