American Friend
Retro Guru
You can buy a production bike/frame and tweak the position of the saddle and handlebars to get the best position, but there's something very rewarding and satisfying and special about getting a custom-built frame (when things go to plan). The frame will give you a lifetime of pleasure riding it, both because it's a great frame and because you were personally involved in the key decisions. You will never feel that way about a production bike no matter how good it is.