"Text to Speech Eric Ivona Full" appears to refer to a full/complete Eric voice package from Ivona (a high-quality TTS voice previously produced by Ivona Text-to-Speech). Ivona was known for natural-sounding, unit-selection and later statistical parametric voices; Amazon acquired Ivona in 2013 and integrated some tech into its services. The Eric voice is a male English voice that many users seek for clarity and naturalness.
CNN-Style Delivery: The voice was modeled after a Hollywood professional, specifically designed to sound authoritative yet engaging, making it ideal for news and narration. text to speech eric ivona full
The long answer: The voice lives on.
The short answer: You cannot buy it directly from Amazon anymore. Review: "Text to Speech Eric Ivona Full" Overview