Wiring this up is fairly simple. The old potentiometer has six terminals on the bottom and two on top. The new potentiometer has 8 terminals on the bottom. On the new potentiometer, when you're looking at it from the shaft end, the six terminals on the LEFT side are wired up just like the six on the bottom of the old potentiometer. The two terminals on the far right side (one in front, one in back) are wired up just like the two terminals on the top or side of the old potentiometer--they're the loudness tap.
US shipping and handling is $6, and international is $20, 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 pots and other vintage electronics listed--feel free to take a look! 