This is what I've been using as a video switcher for my systems on composite. It does composite as well as S-video. I haven't tried out the S-video to see how well it works. I was going to pick up another one of these since I've had to double up my systems on the one I have.
http://www.ebay.com/itm/Pelican-Vide...item4600e5e38c
As for those component cables, you have a PM.