I think so. The stereo one, of course. Not completely certain about the exact part number of what I used.

I do remember that the one I used didn't have a very wide useful range to its travel. Because it was such a high-resistance pot, the area between "silence" and "full volume" on the potentiometer was about 1/8 of the turning radius of the knob.

Another thing you could do, which might save you another trip to The Land Of Blank Stares, is this: Just plug in one channel with a mono pot that you've got lying around. Fiddle with it until the volume is where you think you want it. Then measure the resistance on that pot and put fixed resistors on the connectors instead of making the system adjustable.

And yeah, the center pin on RCA jacks is the positive signal, the sleeve is the negative ground. And in many cases, the negative ground on the sleeve is common between both L and R, in case that simplifies wiring as you're working on this stuff.