Help identifying this model boat
being as how you're in the US and I'm in Oz I reckon it is not much use me recommending a local Oz sail-maker.
From what I can gather from other fora (like that? My high school Latin does get some use) in the US a pretty good maker seems to be Carr Sails http://www.carrsails.com/
I am guessing that the cost of a set of sails for your yacht would be similar to those quoted for the Bearospace 'ANNIE'. $225 may sound like a lot but, from what I can gather, his sails are pretty well at the top of the pile. Check with a local sailing club, there are heaps of people around that make their own sails as well as lesser known sail-makers. The club may be able to point you in the right direction.
Unashamed plug for the Bearospace range of boats - I have no financial interest. There is a lot of info in these blogs to assist in building and making parts for semi-scale sailers :
https://www.rcgroups.com/forums/showthread.php?2990671-Bearospace-Sloop-EMMA
https://www.rcgroups.com/forums/showthread.php?2550991-Bearospace-schooner-Irene
https://www.rcgroups.com/forums/showthread.php?3294855-Bearospace-Schooner-Annie
I hope this can help you.
Cheers from Down Under,
Terry