I have a "MadCatz" composite / s-video adapter that has composite+audio and s-video at one end... and big expansion/media type plugs for Wii, PS3/PS2 and XBox360 at the other.
I know this isn't quite vintage and it might be useless.. but it also might be a helpful for someone doing emulation of older systems on a console, type thing, so I'm mentioning it before I throw it in the copper recycling bin.
I also have a SCART lead, if someone needs one?
"dsakey" on trademe. Apple II's are my thing.