I have the same qns but is he not interested in sharing the info
Haha it's obviously an ego thing. Probably doesn't want to lose his shoes' exclusivity.
But since his are not true bespoke, those interested in similar offerings can look at shoes by
Antonio Meccariello. AFAIK, he offers one of the cheapest MTM, only slightly more expensive than Vass,
starting at 450 euro. You can send him your best fitting shoes, or send him all your foot measurements, and he can modify one of his lasts for you. IMO, this guy is one insanely-skilled artisan, and can apparently do any kind of welt. There's definitely a Berluti and Bontoni feel right there.
There is an interesting 16-page thread on Styleforum here:
Antonio Meccariello Shoes
Caution, expect extreme shoe porn if you click this. 