BC- If you bought them with a credit card you should be able to get a refund by writing a nice, clear letter to the credit card people, explaining every detail, include a photocopy of the catalog etc. This would be the easiest route for settling this. They will lay down the law with CP who I'm sure will cooperate in order to keep their merchant account. I'm no lawyer but contract law and consumer protection law is on your side.
As you say- they may be decent gages but at this point it's the principle and as nice as your Daytona is I'm sure you'd prefer the matching gages you thought you were getting.