If you want to go a cheaper route. Take it to your lock Technology school and get some students to mill them out of metal. That's what I would do if I needed custom metal
this.
We have a sheet metal class at my school, and the teacher encourages us to do whatever we want in there that will provide us with practice. The shop has a lathe that I had to use once to make a bunch of bolt spacers for a nose landing gear actuator.
I'm sure if the instructors at a school near you are nice they'd be happy to try to make something.