Voice sample ships with the kit, not on the public web.
Publishing a playable cloned-voice MP3 would help the very scripts the kit defends against. The kit includes a short listening exercise under controlled conditions. Register interest at the homepage to be notified when it ships.
What you'll hear in the kit
A library sample of a synthetic voice asking for help. Listen so you can recognize the cadence.
Listen with intent
The first ten seconds usually carry the clearest tells. Note the cadence, breath placement, and whether the voice avoids names you'd expect.