I deigned this DIN rail mounting bracket for an opertator interface PCB used with a PLC. There are four corner holes using the solidworks hole wizard that can be adapted to fit your specific bolt hole layout for your PCB. They are currently configured for loose fitting M3 threaded inserts with a thru-hole to sandwich the backet between the screw and the PCB.  Should be fully configurable for your application. Matches DIN rail tophat configurations.

I personally did not use supports with the ABS but I am wishing I did. Slight sag on the rails themselves. Only tested with bambu ABS.