[MARMAM] Collections with whale earwax plugs

Hi! Pauls Stradiņš' Museum of History of Medicine in Riga, Latvia is looking for museums / research institutions having pieces of whale earwax in their collections. So far, we know about Natural History Museum in the UK and Smithsonian, but we'd be happy to hear about others. Those can also be research institutions that have used whale earwax plugs in their research. Looking forward to receiving any hints! Justīne