lorax - 11:22 am on Sep 28, 2010 (gmt 0)
Does this product have good position in the SERPs already or is it a new product?
Does the site have good traffic overall and place well for the target keywords?
If yes to the above, I wouldn't worry about one page of dupe content - but don't make it a habit.
But if you're still worried, can you add significantly more copy to one of the dupes?