Yeah I thought it was somebody like zero that made them. Zero makes some really cool bikes their lines are very artistic. As far as the block, cant tell for sure from the pics for sure but i think its just and HD block. The newer S&S assemblies are plastered with their logos, but you should be able to find a HD vin on the left side of the block.
Maybe put a business card or note on the bike next time you see it and try to meet up with the guy. Never hurts to try.