http://tony.maro.net/mod.php?mod=downloads&op=showcat&id=2&level=1

This is a temporary location for this component, so I'm not going to link from the Lazarus website yet, but thought someone might find it useful in the meantime.

I created this for CBT 2.0. It's a custom combo box that is already populated with 102 different country currency formats.

Once a format is selected, it also includes routines to convert a real number to a string representation matching that format. For instance, select "US Dollar" in the drop down, and call
CurrencySelector1.FormatSymCurrency(123456.78); and it will return "$123,456.78" Call FormatCurrency(123456.78); and it will return "123,456.78" without the dollar sign.

It supports everything from the Argentina peso to the Zimbabwe dollar. No doubt it's ugly code, but it works. No, it doesn't do exchange rates.