I really wanted to have the FP6120 for my SBC6120RBC system. Unfortunately, the front panel has been out of production for years. Like the RBC community, I re-implemented the front panel also in KiCAD as the FP6120DTR and ordered some PC boards for my SBC6120 system.
My re-implementation follows the original electrical design very closely. I also tried to scale several pictures and drawings to re-create a physical layout which closely matches the original front panel. I did exclude the I/O expansion board, compact flash card and IDE disk drive mounting locations for my re-implementation.
Once I removed the extra mounting locations, I realized the switching power supply, power switch and supporting 9-volt DC connecter could also be excluded. All the required power need would be received via the 50-pin interface connecter on the SBC6120 main board.
Some of the mechanic changes made was excluding of the LED BAR on the front of the board assembly. I opted instead created 3D printed LED parts that provide both spacing and light isolation. Finally, I moved the board mounting holes. I place five mounting holes around the outside edge of the PC board.
One thing I still have not been able to recreate is the nice front panel artwork that mimicked the look and feel of the original PDP-8e. In the end I used my LASER cutter/etcher to create a see through acrylic front panel which nicely shows of the under workings of the front panel.
This is the link to the PDF for the FP6120DTR version front panel schematic.
This is the link to the PDF for the FP6120DTR version front panel BOM.