I was just given the Alesis Multimix 8 USB but my friend had accidentally thrown out the power supply with some other old electronics. As it would turn out, this is very hard to find. There are no after-market power supplies made, as far as I can tell. The specs are 18V 500 mA and here is a picture of what I need:
 

I cannon get Cubase 5 to recognize my Alesis Multimix 8 USB. (Please note that it is not the USB 2.0 model.)

I have tried visiting the Alesis website to download ASIO drivers, however there are none available for this board, as it is a plug n play device. The board included a copy of Cubase 4 le, so I am assuming that it SHOULD be compatible with Cubase 5.