https://creativemarket.com/Ultrashock/1355356-Retro-Brushes-Halftone-Textures

Retro Brushes is a massive collection of 110 Premium Quality Halftone Brushes for Photoshop. We spent an insane amount of hours tweaking and perfecting this amazing brush set with one thing in mind - to create an authentic halftone brush collection with a wide range of uses and options so we could give our customers creative control. This pressure sensitive halftone brush set runs the gamut from light and subtle halftones, to heavily distressed.