I am also taking Baclofen for cervical dystonia and muscle spasms in my neck/shoulders, etc. I take about 40 mg at night.
Although you asked about Baclofen to help with the Klonopin withdrawal, I wondered if you are able to get Botox treatments for your cervical dystonia at all? I am getting them for that and for migraines and they have really helped, which is in part why I'm looking to get off some of these meds I'm taking on a regular basis. My insurance covers Botox for both conditions, but I know that there is a patient assistance program from Allergan to help those without coverage get this treatment.