Here are a couple of different color varieties incase you though his main clothes were kinda stale like I did.

1. Black hat and coat with red tie
2. Brown hat and coat with a black tie
3. Black hat and coat

Download more than one and mix and match if you like its just two files or leave a comment if you like some other colors


Install:
Edit sResourceDataDirsFinal in your fallout4.ini
located here:
%userprofile%\Documents\My Games\Fallout4

How it should look:
sResourceDataDirsFinal=STRINGS\, TEXTURES\

Extract the zip to your data folder. There should be a folder named textures.

Textures>Clothes>Valentine

As far as im aware nexus mod manager should let you autoinstall this if
you prefer that rather than manually if you have any problems let me
know.

Screenshots have an ENB enabled

This mod doesnt include the glowing red eyes which is one of my other mods, if you would like this also you can download it here

http://www.nexusmods.com/fallout4/mods/1414