I keep hearing rumours that there is a dive center in Khura Buri that
will do day trips to Richelieu rock.   Nevertheless, I cannot find
anything on the web about such a dive center. Other websites mention
that day-trips to Richelieu rock are possible from Khura Buri, but
provide no details.

Has anyone made a day-trip to Richelieu rock from Khura Buri Pier
(i.e. Ban Hin Lat ) ?   Does anyone have any information on a dive
center that can provide a boat and guide to Richelieu from Khura
Buri ?

I know all about the live-aboards from Phuket, I am not interested in
those because I don't have the time.  I am trying to put together a
weekend trip so I can drive down from Bangkok with a friend.   We only
want to see Richelieu.