I got my cheap power brick off ebay yesterday so I decided to adapt it to the Mendel standard XLR connector. The power brick was only £9 inc the lead and the seller even threw in a European power adapter, not bad, hope it lasts. The connector was a sinch to solder up even for me! Double checking the polarity with a multimeter I hooked up the positive (red) wire to pin 2 of the female connector. I've also received the male chassis connector so I've temporarily put it in place using a cable tie.