No they won't be offered to you because they are not OEM for you unit. You can get the Aussie Karen from the link below just change 'Karen' to 'Lee' if you'd prefer him. There are American & British available too of course, but no point if the AU TTS3 don't work.
Code:
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It's an .rgn file but just extract the voice and load as described here: [Only registered and activated users can see links. ].