I looked into this quite a few years ago after seeing an old Velophot in a local second hand camera store. This was a German design patented around 1920.
In my research, I came across Kurt Mottweiler's website. He was in the process of building one at someone else's request. This is the link directly to that post:
https://mottweilerstudio.com/velophot-one-minute-camera/
He has other write ups on the project, but they're not all listed with the same tag. Click on "street photography", "one minute camera" and "wooden camera" for other posts on the subject. He does truly beautiful work but is, unfortunately, not at all local to you, being in Portland, Oregon, USA.
I was also going to mention Joe Van Cleave (linked to by StepheKoontz in the above YouTube video) if you wanted to go the DIY route. Again, based in the United States. He is a member here, though, if you're wanting to pick his brain.
Also a member, although I've not seen him about lately, is Nigel (Smith, I think?) located here in Australia. He has an Afghan Camera. I can't recall if he built his own or not, although I think he did. At any rate, he'd certainly know how to go about putting one together if you wanted to reach out to him.
I hope this gives you a little direction or impetus to make your own. I wound up deciding to make a mostly portable Darkroom box instead, to work out of the boot of my car - more as a show and tell for friends than any thoughts of setting up a street vendor outlet. The materials I bought for the project are STILL sitting in the spare room awaiting attention! I wish you a tonne more motivation than I've managed to muster up! ☺
Kindly,
Molli