One more place that comes to mind is Goby Walnut in Oregon.I think you can 10/4 or even larger if you call around.But like peter said its going to be pricey.Dont know any places for Cypress except my backyard.I have a nice pile of leyland cypress drying wont be ready for at least two more years.IF your interested in cedar easy creek in oregon has some of the best alaskan yellow cedar and red.Not a tru cedar more related to the cypress species.Good luck with your door show some pics when your done.