In the design of our new TwoLane
we were tempted to use computer power supplies, you can often find them real cheap. The few that we tested were found to be unreliable. I think someone else had mentioned they really want/expect a large current draw on the 5v and/or 3.3V output to be stable, the ATX version have an unfriendly electronic on/off switch.
I have a fair number of 12v 8-Amp power supplies that we ended up not using in our chargers, since we went to 12amps. I can sell these fairly cheap ($15) if anyone is interested. They are open-frame supplies, so they really must be put into a box of somekind.
Here is a link to them 12v power supply
I suppose I should post something in the for-sale group?