I'll check again later... I think they had a few with -5 but not sure if they were the small guys or not. I was planning on skipping -5 but I guess I shouldn't take that kind of shortcut.
A unit like you have in your supergun is exactly what I'm looking for, although I'm after one with considerably more wattage. I'd like to be able to power any board I might come across, including 6 slotters.
It might be a good idea to try and find one that puts out higher voltages at more amps, and then hook in a voltage regulator to get it down to what you need. Basically what Xian Xi did.