Can't help you with locating an already fabricated galley, but if you want to make one yourself, they're a fairly simple design: a small sink with a flexible hose leading to a nearby through hull, a hand pumped faucet and a single burner Origo alcohol stove. If you want to try, I can measure mine and post a sketch with dimensions for you to use.
Jim Kolstoe, h23 Kara's Boo