Aloha
What difference does it make. As long as it is done right it could be made anywhere. None will be made if no one will buy them.
Why don't you do all the research spend your time and money and have parts made and stock them for years before you get your initial investment back if ever for the good of the club like I have done.
There is no money to be made making Kaiser parts, it costs to much to have things made and way to long to sell them. Most people have already stopped making things. My suggestion is to stop bugging those that still want to help.
I've been watching your threads with great interest and commend you for taking the initiative to invest the time & money to produce now extinct & much needed parts.
Many years ago I produced a very nice lightweight titanium specialty tool for my old trade that really made life easier. First a couple prototypes and then a very small production run, followed by another small run that in total numbered only 10 percent of the number of tradesmen in my area. Most of the hardcore tradesmen in both unions that used them snapped them up immediately, followed by the guys that said "maybe I can get the company I work for to buy me one".......and my favorite........ "let me know when they're almost gone" The tool was only $30 at a time when we were all making well over $20 per hour.
It took 4 years for me to sell them all & break even. Of course after they were all gone guys asked for years if I have another run made, one company even had a few made just for themselves.
I can think of a few Aero parts that are needed but every time I start to go down that road I remind myself of the years it takes to simply break even, compared to even an average performing investment fund.