There are some good person to person sharing protocols out there and you can find them on a search engine. (Google etc.
Morpheus has an audio category search, and this is where I download merengue etc.
Another good one is WinMx, although it doesnt have a category search you can put in song name or artist and find it, I usually put in "meregue" and set my search parameters high and lots of songs are shown that are available. Both have the facility to start the download and preview the song when a small portion is downloaded, if it is not the right song simple cancel the download.
They work good.