I recently picked up a Super Graphic that was in great shape. It came with the spring back with a decent GG on it. Only problem is that spring back is missing the spring and chrome arms that hold it to the body. Does anyone have any idea of where to get those or a new spring back?

Also, I'd like to send it and my Pacemaker in to a repair guy for total CLA, especially the shutters. Any recommendations?

The Super Graphic has a Graflok back. That is the focus panel for the graflok back and it is extremely rare that one or their parts other than ground glass and fresnel become available. See the related web sites section on the home page for possible parts sources.
http://www.cameraeccentric.com/html/info/graflex_6.html

I sent you a PM about servicing the Pacemaker.