There are parts of most any of the old two port rinse agent dispensers that are interchangeable, so dispensers up to the ones used in the 18 series KitchenAids and Whirlpools late into the 80s, I think, could be taken apart for the part you need. I think you might find one of the old style dispensers new in the box at Modern Parts in Parma, OH. Larry is the owner and very helpful with parts for older appliances.