Michael Storer, the designer of the Goat Island Skiff and many others, has started a sail making loft with some friends in the Philippines. His standing lug rigs being powerful, low aspect and easy to reef, make them a good option for any outrigger sailing canoe. The prices are good and reef points are included. Read this page on adapting his sails to other designs.
The worst case scenario for adapting these sails to my designs would involve drilling an extra hole for a different leeboard location and adding some extra reinforcement there.
And yes, I know that's a unimaran in the above photo :-)