I only see them when my friends Lagavulin and Laphroaig visit...
I understand these medications are available at the market in Brigadoon. But unfortunately, they only work on Caledonian Little People, which does one precious little good if you are trying to follow the Leprechaunis Hibernensis.
Now as is well known, if one should want to see the Indonesian Little Folk, one must leave a human baby outside of their cave. Have a couple of snorts of palm wine, or whatever these worthy oriental gentlemen drink, and set up a simple box trap. It would also be a good idea to have a Japanese tourist at the ready with his trusty camera. Without proper documentation, you might as well be fooling around in Kenya.