How do I get these currencies' images for non profitable purposes?

I'm a biologist who works on a science communication project related to amphibians. I'm writting a post about currencies that have amphibians in it, so I've alredy got a lot of them from Numista and other sources that make it availuable for free use.

However, I still couldn't find these ones: 

N#206877

N#212038

N#210440

N#254527

The question is: is there a way to find or request images of these currencies for free use on an instagram account post?

 Apart from your question - may I point out a great site you may be interested in … 

https://en.numista.com/forum/topic20395.html#p192881 

which I have been a fan of for years. Most coins, with animals/creatures et cetera on, are in there. 

http://www.coinzoo.net/ 

 Which actually may also answer your question - if those pictures are on there. 

 Although - having written that, then I clicked on those four links - 

and see they are all banknotes, not coins. Still, maybe that site 

I mentioned would one day, if not already, have a banknotes section … 

Willison

However, I still couldn't find these ones: 

N#206877

 

The question is: is there a way to find or request images of these currencies for free use on an instagram account post?

https://www.banxico.org.mx/footer-en/disclaimer-usage-policies-ban.html

“Banco de México hereby authorizes the general public to use and reproduce the information contained herein.”

Find that note on central bank site or contact them and ask for specimen image.

In case of Aruba. https://www.cbaruba.org/document/reproduction-conditions/ “The CBA shall not oppose every portrayal of the 2019 series Aruban florin banknotes, but only those portrayals which are contrary to the reproduction conditions of the CBA for the 2019 series Aruban florin banknotes (hereafter referred to as Reproduction conditions” and Article 2 chapter E. Maybe contact them and ask as website has only current images.

Central banks are primary copyright holders of modern notes and they set conditions for image use.