Hey Lorne
Have been on a few fishing trips down in PV.
Here's a few names from some of the guys we tried.
Jackpot charters, kind of pricey but VERY NICE boats. We went down to the marina and booked them ourselves instead of booking them through an agent. We had great fishing with them.
Here's a link to a guy named Phil we have used a few times.
He can arrange a shared trip or a private one, whatever you want
http://vallartafish.8m.com/ and if you get lucky and catch a big one he is also an agent for Gray's taxidermy. I had 2 replicas done with them, very good work.
He can line up a trip either offshore for Marlin and Sails or inshore for Roosters and whatever else is around.
We booked a boat through Masterbaiters one day then booked him again later on without going through them and saved 150$$.
We went out as far as El Banco and Corbetena and had good fishing but have also had some pretty good fishing in closer as well. Go down to the Marina and talk to some of the other people that have been out in the last couple days, see where they have been going. It is a long ride out to El Banco.
Here's a few pics
Good Luck Fishing