Where To Get World Notes

Knowing exactly what countries you are looking for would be helpful.

You can order notes for some countries like Denmark or Fiji directly from the issuer. The shipping and handling charges are somewhat inflated but it is cheaper than traveling to the country yourself.

Many of the issuing authorities set up booths at the major coin shows. I do not know who sets up at the CNA show but many are present at ANA in the US.

Finally, you can join an organization like IBNS which has a worldwide membership and make contacts with members in the countries you are looking for.

You probably already have a small note from Panama in your pocket as they use the US$.

A currency exchange in the US will not have Iranian notes because of the trade embargo. They are likely not going to have any of the other countries you list other than maybe South Korea. (They will not have North Korea.) They usually only keep the major currencies on hand.

They will probably also not have UNC notes.

I joined a banknote club on facebook and have made a few friends. So far I have traded with a friend in Egypt twice and it has been great for both of us. Our trades have been fairly small but building a network of trustworthy friends from a around the globe I figured would take time. Seems like it should pay off for all involved in future years though. Registered mail and lots of group photos and testimonials about other members seem to keep the riff raff out but id still only trade small until real relationships develop.