I love the show and have been slowly getting parts to build a man in black costume.
here is some reference and links to what i am using or considering using.
the jacket is going to be made by magnoli clothiers.
the material for the screen used jacket was made by these guys.
here is a pic of the material.
they will also do the vest or god save the queen fashions will do it for me.
the hat is a black us cavalry hat that is flattened.
if you want the real deal baron's that made the hats for show is offering the man in black. thanks to user benhs1898 for the link in the westworld costume thread.
now to decide either a stetson or buy this one. it is pretty popular style of cowboy hat.
his shirt looks like a dyed gambler shirt.
his tie is what they call a diamond dobby print. this is the closes i have found. with some mods this will be pretty close. it needs to be sun bleached.
material so far for the vest.
the gun is a le mat. denix makes a replica that needs to be moded. here is a whole thread on how it is done and the parts you need.
the knife is a bowie knife that is available at http://nantahalatradingpost.com/daggers--bowies.html
the bowie has been aged and they added twine to the hilt and the end of the handle.
here is my bowie with my maze scalp replica.
here is the reference for the gunbelt. the belt is called a money belt. he has a right hand cross draw slim jim main holster and a loop holster to hold another barrel and cylinder assembly for his le mat. he also has 3 loops for 20 gauge brass shotgun shells. this is same belt william is wearing when he comes back to sweetwater.