If someone hasn't already done the leg work...it can be daunting finding the right part. For your pots....I'd start by looking at the pictures in the Mouser catalog...next you have to look at lead spacing....sometimes there's diagrams in the catalog...sometimes you have to pull up the item's page on Mouser's online catalog, and open up the datasheet. Often times you can't get the leg spacing "just right", but get it close enough to bent the legs to fit.
Edward