Mike, thanks for sharing your dxf file for your mounting system. I imported it into Fusion and made a 3D-printable version. Attached are the STL files for those that want to print it.
Male Mounting Block v3.stl (298.1 KB) Female Mounting Block v3.stl (318.2 KB)
Also: the recesses for the 2mm thick magnets are 3mm deep to allow ample space for epoxy or e6000 adhesive. If anyone prefers to use CA glue, I could post a version with shallower holes.