The original endstop by divide was too tall on my Mini v2, I think the opening on the z axis for the x axis arm isn't as low as the v1. I quickly designed an internal endstop mount that attaches to the bottom of the z axis rods.
Spacer is separate (optional if using even longer m3 adjustment screw, I'm using a 30mm) to make it easier to print/use less material.
You will need the adjustment screw holder from https://www.thingiverse.com/thing:2217149
Intended for use and installed with https://www.thingiverse.com/thing:1775502
Very rough and done quickly to get the Mini working again. Made in Fusion 360, step file included.
November 2017 status update: I finally got a replacement MPSMv2 last month. I will likely be updating this design by the end of the year.
Holes will need to be reamed to fit rods. Does not need to be a tight fit, but there should not be any play.
Mount is sized to be a press fit for the micro switch, some trimming/sanding may be needed if it's too tight. Because of the spacing, fit and application, screws did not seem necessary, but holes could easily be drilled if desired.