Monitor top pen holder, frameless

The initial print profile fits a Dell S3222DGW. It's a curved frameless monitor. The square flat top is almost 30mm deep, flaring to 37mm. So none of the few existing over the top holders would fit. The squares are 14mm, so most pens fit. Even the clip on a fine point sharpie will go in at a 45. There are 20 pen slots, a nice even number.