Other thing I will add is...and please take this constructively, I find the vast number of people that think they need a unique geometry don't. Or at least they shouldn't. For example you want a tall frame and relatively short top tube. Why is that Avista? Why do you want to ride so upright? Upright isn't very good on a road bike. If you get a chance, share your height and leg inseam...measured with thin book method. So many believe they need a unique geometry because they haven't refined their riding position. If you are long legged for your height, then I understand why you may want a bit taller head tube. But there are a lot of endurance frames on the market...many that will provide this balance. You don't need a custom geometry.
I will give you an example. The Trek Domane has a 567mm effective top tube and 195mm head tube in size 58. This very closely coincides with what you are looking for. Bianchi may have a frame very similar in terms of stack and reach as most major manufacturers offer such a geometry. If you want take the stack and reach off a Domane geometry chart as your baseline.