I tried some other caps out there, but didn't like them, so I drew a new one from scratch. Note that there seem to be plugs with different depths, so this will fit some but not all.
Made two versions:
rev A: 0.46in height (see image)
rev B: 0.41in height ( see image)
Print with TPU 95 and your settings of choice
The author remixed this model.
Took inspiration from the linked model, but redrew from scratch and changed everything. Added chamfers and fillets, changed shapes and dimensions to better fit the plugs I have.