I received an email from a purchaser of the PDP-8 Class Project book, Doug Gilliland, who took my design and did an implementation using an Altera FPGA instead of the Xilinx FPGA used in my classes. He also made a custom front panel! Very nice!
You can read all about his project here https://hackaday.io/project/179357-pdp-8-fpga. This is the front panel he designed:
