I did. The prices were especially tough to find, so I cannot direct you to one source. I used a few to come up with the list. That's why you may find the price of a very particular object and not a more common one.
Armor, along with some traditional weapons, was something linked to the samurai class. When they were stripped from their feudal privileges, they were no longer the only ones with the privilege of wielding weapons-including armor. However, on that time the army was created following western standards, so soldiers didn't really wear it. The prices probably varied depending on the quality and the artisan who made it. For game purposes, I would treat armor like traditional weapons, and apply its bonus only when defending. During that period would had been weird to see someone wearing a traditional armor on the streets, so I would also apply a malus or disadvantage in social checks while wearing it.