Not certain if you've seen this web page but it kinda shows how the camera folds up
http://www.largeformatphotography.in...umetc8x10.html
For the knob unless you'll after an exact copy then any hardware store should be able to help.
However it is likely that any setscrew fitted into the knob will be metric - but at small sizes metric and SAE/Whitworth/imperial allen keys are almost interchangeable.
regards
Tony
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