Here's a photo of my C Daylight with plate back. The two finders are a replacement which I made myself. I took the construction and size from my C Ordinary. I think they look quite well.
I'm still waiting for the string to arrive. By the way, the little brass screws to attache the finders with I bought at a screw webshop in Eindhoven http://www.mooischroefje.nl/. They have all kinds of brass screws and if you want to restore a old camera you should have a look at their site.
Today 2 square feet of morroco grain black leather arrived, which I have bought. Alas the grain does not fit the old No. 4 Folding Kodet Junior I want to restore. So the search for the right leather continues.