google
http://radagast.ca/C64_svideo/C64_Svideo.html
for S-video you can do cable by yourself, just need 5din plug and Cinch plug and connect Video out (PIN 4) of C64 To Cinch HOT (the middle one pin) and C64 ground (PIN 2) with Cinch ground (TIP / SHIELD...)
Sure I forgot...
you'll need to make second one for audio
Audio out (PIN 3) of C64 to another Cinch hot (the middle one) (you will need to buy 2 cinch plugs) or you can use Jack plug if you like to plug it to amp ...
and C64 ground (PIN 2) to this second Cinch plug gound (TIP / SHIELD...)


