The original Design posted by SteamKraft didn't fit the extended new version.
The z-axis stopper, and the holes misalligned. The stepper screws also are extended.
I re-created the part from the original: https://www.thingiverse.com/thing:2726525
Fusion 360 desing for modifications: http://a360.co/2l6crf4
PS: I have not tested the final part, some details on the web-page.
Please leave comments and feedback if you make one, I will update and add to the design.
Original part for non-extended version: https://www.thingiverse.com/thing:2091959