CATCHINGCAMP.COM They work with everyone from 8U ballers up to having several MLB catchers in their stable. They used to have a DVD (New England Catching Camp DVD) but have replaced it a live stream version. Look under the premium membership tab.
They are considered the "Gold" standard. It'll be the best $40 you can spend for this type of training. If you get the chance, follow it up with one of their weekend camps or better yet, a 4 day Summer camp considering they're near Nashua.