Modern economy cannot exists without economy of scale. It's unfortunate is that if you want something else than millions of other people the price likely will be prohibitive - small scale production is not viable economically, especially for high tech components and devices.

> I don’t think it’s true that the capabilities to make these devices are lost.

I think they are. Not all knowledge is captured in documentation and blueprints. A lot of knowledge existed only in brains of now retired people. And even blueprints are lost when companies go out of businesses.