Quote of the Day: Unknown

A guy I was interviewing for a story told me he had a favorite quote: "Quality remains long after price is forgotton." Sounds nice, and vaguely familiar. My interviewee attributed it to the economist John Maynard Keynes. Sensing that this ought to be fact-checked, I did a quick internet search and came up with a number of confusing possibilities:

1. "The quality remains long after the price is forgotten," said Rolls-Royce's co-founder, Sir Henry Royce.

2. "The bitterness of poor quality remains long after low pricing is forgotten!" - Leon M. Cautillo

3. "Quality is remembered long after the price is forgotten." - Gucci Family Slogan

4. "The bitterness of poor quality remains long after the sweetness of low price is forgotten." --Ben Franklin

Leon Cautillo is a Christian self-help writer who was probably quoting someone -- Henry Royce? the Guccis? Ben Franklin? -- else.

Does anyone know who said the original quote? What I do know is that it wasn't Keynes.