I need to get a 6V 500mA adaptor for an optical to coaxial converter I'm getting from Parts Express. However, the adaptor that they have listed on their website for the converter is out of stock and isn't due back in for a couple weeks. Does anyone know any other place that has one of these? I did a search locally and was able to find a 6V "600mA" adaptor, but I didn't know if that would affect anything if it put out an additional 100mA. If that doesn't matter I'll just go with that. Oh, the adaptor needs to have a universal end that allows different style plugs.