This is a zero offset E3D holder/mount for a Maker Select Mini (Maylan M200) printer. This part was teased on the Maker Select Mini Facebook page and Hackaday over a month ago, but the STL file was never made available. Instead of waiting any longer, I went ahead and modeled it in 123d Design. I am including the 123d Design file so that you can make changes to customize the mount for your E3D--mine is a clone and maybe different that the original or other clones.

The clamp part is reversible, so use it in whatever orientation works best for your wiring arrangement. Also, there is no fan mount on this holder. I currently use a fan/cooler holder like this: http://www.thingiverse.com/thing:839620

I am including a reference to the Hackaday article for background information.
https://hackaday.io/project/14823-monoprice-select-mini-maximum-3d-printer-mods/log/46025-zero-offset-e3dv6-clone-hot-end-mount

Required hardware:
4 x M3 nuts
2 x M3 x 20mm screws.

You can use the existing cap screws on the X carriage, but you will only get about 2 or 3 threads of engagement. This was an area of the design that I struggled with: make it too thin and the nuts can pull through; too thick and the exiting screws will not engage the nuts. With the design file, you can change it to suit your needs if you are not happy with my choice.

About the pictures:
The green part was rapidly printed in PLA to test fit and clearance. That is why the printing surface is of such poor quality. The 5 test models took about an hour each to print. The white mount is in PETG. This is the finished, working part and at 100% infill, took about 2 hours to print.