Originally Posted by Maelochs

...If I were going to get a custom frame built, I would want to have put a lot of miles on a similarly sized (at least contact points) bike so I would know that it fit, and so I would know what was sort of a median set of dimensions so I could later adjust the adjustables and keep my comfortable fit. ...I don't normally suggest compromise, but considering what you are likely to end up spending .. I'd buy a test bike or two first. I am sure you can get a bunch of small bikes off Craigslist or something ... they usually sell cheap because the market is small (no pun intended but it is pretty funny.)

Find a bike----any bike---which fits you well and ride it enough to be sure it has the right contact points: saddle, pedals, and bars. The you can work backwards from there to fit a frame that connects all those points...