All of these files are available free of charge

Sendcutsend is my go-to for one-off sheet metal parts. They can do bending
I can 3d print the required parts for you, just let me know! There are other 3d ptint agencies that are also happy to assist

I spent a lot of time prototyping these. The files are available for free, but please consider donating if you like the kit! That way I can keep this website running and keep making new things!