You can get a
power supply with those voltages and
current ratings at mpja.com. You can also get all of the cases and ac
power connections at the same site. Getting a supply with higher
current ratings won't hurt as the board will pull the
current it needs. Just don't go smaller on the
current ratings. The same site has DIN connectors. The wiring of the DIN
connector is available on
line do a search for
ETC Express DIN
power connections. Sometimes on that site you will also computer style
power supplies where all you have to do is put on the DIN
connector. If you don't solder, find some school kid who is a geek about electronics, who can do it for you.
The down side is that there were two series of
Express boards when it comes to the
power supply connections. The older ones used what some refer to as a mini-DIN. very similar to an
S-Video connector only with more pins. These connectors are quite a
bit more difficult to find, but they are available on
line, with a
bit more search. They are also going to require slightly better solder skills. The later boards use the more traditional and what is known as the original DIN
connector.
I have built more than a few for theaters near by. As far as I can tell, the 12 volt portion is only used to supply the
xlr minilite
connector, but there might be a comment forth coming correcting that. When wiring the cheaper DIN connectors, they might not have numbers indicating the pins, so be careful that when wiring the
connector from an picture that you know if the picture is from the pin side or the solder side. Damage may occur if you get it backwards. Good luck and let us know how you did.