I might also suggest Maftei in Vienna. Bespoke starts around €1000 with a test shoe and refinement then the finished shoe with more adjustments to get the fit bang on. They are also very open to doing whatever toe you might like.
If it was their bespoke and not their MTO, I would not want to order 6 different shoes off measurements with no fittings and then have to deal with adjustments or remakes on all or some of them. We are all aware of some variation in Vass MTO makeups given their hand made operations. You also gave to take into considerarion the difference in fit between a balmoral and a derby. think it more prudent to do a balmoral and if you were feeling lucky a derby and dial in those...
If you are doing true bespoke with one maker you would probably be smart to have one pair done and dial in the fit before ordering another pair. Despite the fact that bespoke is based on your measurements, often adjustments are required to refine the fit.If you are going with several makers then order one from each. It will be a grand experiment and you will have the ability to refine the fit of each prior to ordering more.
Well, Vass is neither far eastern or Czech. If you are going to visit them versus doing it via Internet you have the ability to try various lasts to see which fits you best. I would also say to take a look at the traditional lasts instead of just the F, U and K.