I have remodelled the part using the original as a reference so that the bottom part is actually flat and can be used to print the part standing up without using supports. I have printed mine in PETg and they seem to be working fine, though like the original the fit is not perfect.
Edit: This is a remix of https://www.thingiverse.com/thing:748601 , the printables import does not seem to show this info. It is however a full remodel, using a different orientation and completely new SCAD code.
Category: Replacement Parts
The author marked this model as their own original creation. Imported from Thingiverse.