I’m relying on Google Translate, so I may be wrong, but these appear to be dubbed.
Here’s an English listing for that first link. I’m afraid no such thing exists for the second.
Apparently the Prequel Trilogy DVDs don’t work in US DVD players, since they’re “configured” for Japanese ones. I don’t think you’re in the US, but it’s something to consider. They still seem to work if played on a computer, though.
I don’t think you can get the audio tracks any other way, I’m afraid.