A proof-of-concept neural brain implant providing speech

I often wonder how such teams build their devices - I assume it requires quite a few pieces of equipment that can't be bought at a nearby shop. Are such devices ordered from some manufacturer or are they built in-house somehow?

University researches in general? The boss always knows a small company that can make one, and staples a bidding notice to campus notice board for formality as the device is getting made and delivered. Isn't that how they do anywhere it might be?

There are specialized companies selling components, what you cannot get you manufacture yourself. Assembling the device for prototypes like this is usually done in house.

Established labs often have a specialised section that cultivates all the little tricks how to do these things.

Knowledge is transferred by hiring postdocs that have the skills you need or by sending a phd student over to be trained.

As a scientist, if you do this for a while you end up with insane skills, but there is no place for them on the job market.

Everybody else is living 15 years in the past from your perspective.