I don't have reliable information about "Duffy Power & Argent" as a specific music artist or group to write an accurate biography. To create appropriate merchandise store copy, I'd need clarification on whether this refers to Duffy Power (a 1960s British rock artist) and Argent (a 1970s rock band) as separate artists, or a collaboration between them. Could you provide more context about which artist or era you'd like me to focus on?
