I don't have buffing pads for the JW polisher, but do have lambs' wool pads for my air-powered Electrolux polisher, so that's what I finished with.
For the 105, I used a stretched-out Eureka Sanitaire belt. I slid the belt down around a glass gallon jug [no easy job mind you!], and left it there for a week until it had really stretched out. This is not an ideal replacement since the 105 belt was slightly larger in diameter and rather narrower in thickness than the Sanitaire belt, but it works okay. You just have to make sure the belt is really stretched out, or it will put too much pressure on the 105 motor and mess up the bearings.