I can't say for sure. There is another PDF whith a photo, and they look very similar. As I remember, my pots have 10KOm resistance, the same size and 0.1-0.2W power. That's how I searched.
http://rocky.digikey.com/WebLi ... b%20Data/296%20Series.pdf
[edit] As for the ball, well, there is always epoxy available. At least, the shaft is the same size, you don't need to cut or glue pedals, nor cut the box.
http://rocky.digikey.com/WebLi ... b%20Data/296%20Series.pdf
[edit] As for the ball, well, there is always epoxy available. At least, the shaft is the same size, you don't need to cut or glue pedals, nor cut the box.