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by derekp7 4637 days ago
I've seen a few 12 volt ATX power supplies available -- seems to be a bit more expensive ($200 - $300 range), since they are lower volume (specialty) items. Another option would be to use a smaller inverter like you get for a car (they are around 150 to 400 watts, priced about $30 or so), and have one of them for each device you want to power.

Just remember if you are running 12-volt DC, it requires fairly thick wiring to get the same current as you would with 120 volt AC.