Japanese custom shops that specialize in Yamaha SR's are about as rare as pencils, but this one has some interesting hop-ups, and a clean style that I like. Here's the link to their site: http://www.dell-sara1995.com/menu.html
Japanese Custom House 'Heiwa' have a deft touch with producing small capacity custom bobbers (as well as some brilliant Triumph engined digger / choppers). Their link is on the right.