ezlau, here is the link to the maker's online price list with MTM and special leather surcharges:
Stefan88, you'll find some info about the hide from the leather merchant link I added before. For techical stuff, eg. protein structure, density, porosity, you'll have to contact the merchant.
meister, that's the nubuck effect -- subtle and softened. The unsanded grain looks much more gnarled.
I still haven't tried elephant, stingray, mountain ram, deer, shark, reindeer and a few others. Expect more projects in the coming decades -- Gotta collect 'em all!