I hope you like it enough to copy it.
Step 1: No Pictures of Work in Progess
All I did was cut a 1.5" ring of pvc off the section, mark the lines and cut with a coping saw.
I filed the rough edges and sanded everything smooth.
I painted it gloss black to match the tablet face and finished with clear coat.
Step 2: Finished Product
I hope you like it enough to make one for yourself.