I cant see there being any other options for the V6, there could be recaro seats in a few months time but from what ive been told by Jeremy they dont fit the V6 at the moment because of issues with the gear surround. The production of the V6 ends septemper 2005, so maybe there will be some special options at the end of production to clear any stock. Im sure when Jeremy reads this he will reply with his insider knowledge.
As for the ID leather your dealer is right, the leather is no longer an option as it has been ended by renault because of poor uptake of it in the Uk, its overpriced anyway in my opinion.