Erinja:I was going to conclude this posting by giving you a link for a Latin-3 font like the ones you're looking for... but I was unable to find one, after some fairly extensive searching.

I have a version of Arial laying around on my server that can display Latin-3 Esperanto characters.

Here we go.

I fully agree with what you said though, about the pointlessness of Latin-3. Windows XP already comes (or rather came) with plenty of fonts that contain the Esperanto characters. Unicode should be considered as preferable to old legacy encodings that require rare fonts in order to view them.