I do not know any boats up in that area that are doing charters right know. All the boats I know are out of the water because of low demand at this time of the year.
Send me an email and I can set you up with a boat here in Gloucester that is still in the water and is pollock fishing a couple days a week. Also a very good boat.
Not sure where you are in Maine, but from Portland it's about a 1.5 hour drive and then a short ride to the fishing gruonds.