Question for DARUSSALAM HOLDINGS SDN BHD

We are four people traveling by ship, we will arrive at Muara, Brunei on april 21. at 8:00 am. We would like to arrange a One day tour picking us and returning us at the pier. The places we would like to visit are the following:
Jame Mosque, Sultan'Palace, Royal Regalia, Water Village, Abode of Peace, Empire Hotel, Royal Polo Ground, Diamond Arch, Jerudong Park, Istana Nunil Iman, Downtown.
How many hours do you consider for this tour? How much will it cost?
Best regards
Dr. Miguel Pinzon