The successor can be seen here  https://hackaday.io/project/178227-7-segment-module-using-pic16f18446

and also .. https://github.com/Johnlon/SevenSegmentModule

This project replaces the use of two classic DM9368 display drivers with a single 8 bit microcontroller.

The microcontroller being a current part is easy to obtain and super cheap, and now that I've figured out how to use Microchip's IDE and toolkit I have already written the program code and tried it with their simulator.

Hoping the chips will arrive in a couple of days. Microchip has crazy lead times on delivery.

Keep an eye on the new project.