I needed a more solid Z-Axis bracket for my China made Prusa I3 (CTC), with a bigger hole for the end of the lead screw, to get rid of the vibrations. The original parts were made from ~5mm thick plywood.
It had also to be able to accommodate a ball bearing bracket (KFL08) for the end of the lead screw (but it should work even without one).
The design was made using 3D Studio Max and was exported as .stl. There are 3 versions, with different thickness: 5mm, 7mm and 9mm, each version having two distinct parts: for the right side and left one respectively.
Some very slight filing might be needed so as the Z-Axis smooth rod could fit perfectly into its hole.