Givi Tank Lock System

I designed a custom Givi tank lock system for the Benelli TRK 502 motorcycle. I make and i shell it. I was buying the plastic givi plate until now. And i am planning to get a 3d printer soon and print this part.
The ring is metal so i have to make it from a laser cutting machine, fortunately i operate a machine in my work. It could be also from plastic but i didn't test it yet.