From Vitalii3D:

Very rigid mount for all types of EBB36 boards.
– very light
– much stronger than plastic one
– has option to be used with zip ties or gland

Printable PG7 gland adapter https://www.printables.com/model/1108418-pg7-gland-adapter-for-ebb36-mount
Printable PUG gland adapter https://www.printables.com/model/1177241-pug-mount-for-ebb36-cnc-mount