I think I might have a Power One powersupply at home. I dunno if it is linear or not. I think its capable of 20 or 30 amps at 5Vdc. I'm probably going to use it for my little workstation I'm setting up in my bedroom...I wonder how many 74 series IC's I can run with 20 amps...
Anyhoo, a few more details would be nice...like is there a certain model that you are looking for? are you looking for the schematic so that you can copy it and build your own? are you trying to repair one?
Is this why you were asking about the LM723 #1,8 pins?
I'm not sure if you know this, but most manufacturers don't hand out schematics for their designs. Are you sure you even need one? Lift the pins and wire in a voltage source(acting like your DAC) for a quick experiment to see if you can adjust output that way. By the time you find all this information you've been looking for you could have been long time finished with the experiment to see if you can do what you want..