Since the restaurants have the right to change their menu (and often do), the WDW website might be a little behind. So, I would go by the Bongos' menu you are looking for the one appetizer. If for some reason, the WDW website is correct and it is no longer part of the appetizer, I am sure if you ask Bongos what you want that they will make it for you. They have plantain chips there and they have mojo sauce there always so I can almost guarantee that they will put the two together just for you if it is no longer part of the menu.
My wife loves cheese fries and we have gone to restaurants that sell fries and and have salads with shredded cheese and crushed bacon. We have asked if they will do a cheese fries with bacon plate and haven't had one say no yet.