I think you will have some trouble trying to procure new something that is concours correct. Many of us find and rebuild clean old salvaged stock. I'm always on the look out for clean old parts for this purpose.
But if you go new, the upper arms should be bare steel, no paint. The lower arms are dipped black, but only part way. There is no black near or over the lower ball joint itself.
If you search you should find some good information and pictures on what your target is.
Looking at the pictures, the cougar site one looks like a three rivet unit, which is not correct. The Scott Drake unit looks right - four rivets.