Boyd, you can probably find out if they carry what you need, here, assuming you speak the language....
/www.kruidvat.nlI also found this thread on another forum.....
/community.ricksteves.com/travel-forum/netherlands/diapersWhich says ... "The Dutch word is Luier.
You can purchase them in supermarkten (supermarkets) Like Aldi, Plus, Albert Heijn, C1000, etc.
Alternatively you can find them in drogisterijketens (drugstore) not pharmacies. Like Etos or Kruidvat."