Basically a carbon copy of the Z axis motor brackets that come with the printer kit. I had to design and print this because one of my parts came faulty (the internal cuts were shifted relative to the border as per the second image). I managed to bodge it with gaffa tape however until I got this printed off and replaced it. This is what to expect from these cheap 3D printer kits, the quality control of the A6 evidently isn't up to scratch right now I guess. Got it working anyway though.
Hopefully this saves someone the effort of measuring and designing one themselves, or you could change the color scheme of your current ones.