A few months ago in a separate (restoring my Quarter plate camera) thread I posted some small images from an 1898 advert. A couple of people asked to see the complete adverts. They needed considerable cleaning up to be clear and here they are:
Lonsdale Bros, London
Vevers of Leeds.
You could buy everything you needed to just assemble a camera of almost any style you wanted. Lonsdale Bros also sold camera kits for retailers to assemble & customise as required.
Of particular inters is the wooden profiles for dark slides, and the slide shutter's themselves.