Who's offering "Tuner Building" or "Button Installs"? Who is offering a service to install Sub-Out or Digital Out boards?

I see various mentions of this, but I'm not sure who's really doing it. I'd like a Digital Out board, but the only quote I got was a bit too much for my budget. Maybe there are some others out there with similar questions and better yet - those looking to make a buck off of their skills.