Ngaire, back in 2007, eight of us from our Wine group spent three days in Paris before we went to Provence for two weeks and then back to Paris for another four days. We used:City-Discovery.
infocd@city-discovery.com>
They picked us up at Airport, delivered us to our hotel took us on tours, etc.....They were excellent and we had no complaints at all.
Hope this helps a bit.
Ray is doing great, just like new after his Quad bypass and starts his 4 months of Rehab in about 10 days.