I have the capability to do custom surface mount PCB. So electronics too.
Nothing can be "mass produced," because that's not the focus of my shop. I work at the REEF advanced engineering research facility for the Air Force Research Laboratory. Actually, you'll be able to see exactly what I do soon on Modern Marvels on the History Channel.
I don't know why it has taken me so long to realize I could can now fab up just about anything I wanted to for the Supra. Meh, probably because I haven't even driven my supra in like 4 years now.