For my very first piece of MTO footwear, I just put in an order for Julian Bowery boots in cognac shell cordovan. They currently have cognac, #8 and black Horween shells on hand.
I was instructed to take very detailed measurements: ball, waist, instep, heel, pencil outlines etc..
Seems that there is not much price difference having a pair made vs trying to buy one from a store. Though I don't know of anywhere that carries cordovan models.
Hope their 4-8 week estimate is...