So you're basically wanting memory sticks, and peripheal cards, ie sound cards, networking cards...
Motherboards usually don't have fingers on them as they are what everything gets plugged into.
That being said, I am amassing a small quantity of the kind of cards you are looking for. Some of them are rather beat up, and if there was copper on them usually has that pulled off, because of the deal I have with my employers.
I also have motherboards, but you really can't process those in country because of EPA regulations.
I'll try to get pictures taken of the boards I have this weekend, if you are still looking for boards.