After checking out several pillboxes there weren't any that fit my needs that were a single box with AM/PM slots and fit the larger, “horse” pills. One side is AM and then flip it over for PM. It also starts with Monday first. With “indentations” to keep the cover positioned with a nice feel as it's rotated around.
The model is printable without supports and is several parts that are assembled together with a “plug” that secures it all together.
The author marked this model as their own original creation.