You don't necessarily need tinnitus specific CBT, just a good therapist. CBT's goal of learning to identify negative thought patterns and address them with coping strategies and skills works for tinnitus, OCD, pain, anxiety, depression and a host of other issues.
Depressed, negative and unrealistic thinking can amplify all conditions and make them seem unbearable at times. A good CBT practitioner helps you to identify these negative thought patterns and learn to challenge and rationale unhealthy thoughts about your condition (ie. tinnitus).
CBT is one of the things which really benefited me and it wasn't tinnitus specific. It helped me cope with my extreme anxiety, fears and panic attacks which were the underlying result of my tinnitus and taught me challenge and rationalize my negative thinking. My therapist was awesome and most likely saved me from a life of despair and doom.