dc bus bar?

I have several accessories I’d like to install. I’d like to have a 12V power bus located in my dash to feed them. See attached drawing.

I haven’t seen anything that quite fits (Relay + Power bus + Ground bus - all in one.) While I could probably build something, I’d rather not re-invent the wheel.  Is there something out there?

Suggestions?

About midway of the following page are 2 Constant duty solenoids that will do what you need.  The PAC-80 is good for 80 amps and the PAC-200 is good for 200 amps.  A starter solenoid is not a constant duty device.  They start to smoke after about 30 seconds of use.  If the 80 amp unit will work for you,  It is available at NAPA auto parts stores as a       Standard Ignition S-55   

http://www.pac-audio.com/products/productsCatagory.asp?mmSearch=Battery%20Products

Yup, thats what I'm looking for. I can't find a "Standard Ignition S-55 " on Napa's website.  By chance, do you have the part #?

Thanks.

They may or may not still sell it.  20 years ago they did though.    Call them they may not have every item listed on the website.  The search function on their page is USELESS.