Up for sale here is this vintage Rhoades Teledapter TE-100.  This is for hooking a mono TV to an amplifier or receiver's RCA inputs.  This will work fine.  It's pretty old.  Please see my pictures for details.

US shipping and handling is $5, and international is $18, no matter what quantity you buy. All my small parts are set up for combined shipping, so just use the "add to cart" feature and then check out all at once, and it will combine shipping. If you have any questions, please ask.

I have more adapters and other vintage electronics listed--feel free to take a look!