The data sheet on the ELN-60 says that the dimmer can be controlled using PWM. I think I'd explore that, and build a single power supply for the rest. I'm betting an old ATX power supply could be used for all the DC components for an easy(-ish) solution. Or if you want to get your hands a bit more dirty, you could certainly build a single 110VAC power supply that has the exact AC and DC rails you need... be careful playing with mains voltage, though. A power strip may not be that bad when you consider the implications of a faulty homebrew 110VAC solution.
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