You can boot a Lombard off of a 36 Watt (1.5A) Duo adapter if the Lombard has a good battery to help out.

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I am not sure about the differences in power requirements between the two but I was running my mildly loaded PDQ(with no batt) off a 25W Duo adapter for a fair while after I got it and only a few times it needed more than the adapter could give. I had to load absolutely everything to draw too much. Now, I would not really recommend running any power supply that close to it's limit but it is good enough for testing I suppose. *shrug*