This is a blower for a Chimera upgrade installed on Robo 3D, it works amazing for me.
The two regular fans were too weak for me so I decided to install these blowers on my printers, they are relatively inexpensive on ebay.
I attached a .step file in case you wanted to make any changes to it.
Thanks to Mike Kelly for making .step files of carriage and chimera available and making it a lot easier to work on the shroud.
The hardware required are (5) 6/32 screws and the fan itself, one fan is more than enough, so I don't think if I will consider making one for the other side.

I will be working on one for E3D V6 soon, hopefully it will be possible.

Robo 3D

R1 ABS + PLA Model

Doesn't Matter

Yes

150-200

30

I printed parts using PLA at around 45mm/s, with a brim for the shroud to increase adhesion.
The first shroud I printed was printed using Mike's shrouds and I re-printed it using a new shroud for better quality.

I downloaded Mike Kelly's .step files of Chimera carriage and I built the shroud around it.
Mike's files are available @ http://www.thingiverse.com/thing:671881