Ask around for Jeff Shank's email address, or show up at his intermediate clinic held once per month (must sign up at Lake Miona Rec center). He is very interested in promoting the dinking game.
Also, he was interviewed here
Pickleball Classes…Be a Student of the Game! | Pickleball Channel.
Jeff could probably put your in touch with dinkers at your level of play. Or you can meet them at one of his clinics.