ATX 150 to 300 Watts DC-DC power supply
I don't know if these have been posted before, probably. I just was searching for a power supply that could run a full system well. Most of the homebuilt supplies I have seen on here are fairly limited in wattage.
here is the link:
DC-DC power supplies for 1U and 2 U rack mount cases.
These supplies are listed as for 1U and 2U rack mount cases and have high speed fans built in and what looks like a great DC input plug. The 150 Watt is under $90. Didn't check what shipping would be. They list a 300 Watt supply but it looks like a standard case supply.
There were no demensions for these supplies but they are bigger than some of the home made suppies I have seen on here.
I find it funny that I have seen some great systems built into custom enclosures that are the smallest they could be but then are just mounted in an open trunk next to a power amp. If your going to work so hard to make it small find a nook to hide it in so your not dumping your luggage on your autoPC. O well, just a thought :D