Does anyone know a good repair shop for Audio Research products?

I have a SP-6-c preamp that the factory refused to repair. The tech called me and informed me that they no longer made the boards for these. Then I see a Youtube video of the president of the company saying they can even repair an SP-1 if need be.Hmmmm....any help out there? And by the way. I like the SP-6 better than the SP-14 I currently use.