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?