Hi, I am looking for a 120mm or a 140mm fan shroud. I understand that searching that will get me something that mounts between the fan and a radiator to help airflow but this is not what i am looking for. I am looking for a cover of sorts that will allow me to mount a fan externally on my case and cover the sides of the fan for a clean and flush look. Imagine a small box around a fan that makes it look like it was meant to belong outside of a case. Id prefer the build of this fan shroud to be brushed aluminum or just a plastic would be fine as long as the fan is covered on the sides and a grill can be attached (maybe even have a shroud with a grill!)
Sounds like your gonna need to do a custom project man. You could mount the fan on the outside, screw it in from the inside of the case, then get some thin aluminum sheet metal from any hardware store and have them cut it to size, it'll easily bend around the edges of the fan, any grill you want on there can be attached to the outer mounting holes.
This is all just my idea on how to go about this because I dont think anyone makes something like what you're asking for, going to have to paint it to get the color you want though.