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Sunfish my usual approach is to open up whatever I am dealing with, and fit or update the internal regulator to suit,
e.g. the panorama mount I just bought had an LM7805 in it that got concerningly hot and rated at 10-14V, 10 minutes later it has a Murata OKI-78SR-5 fitted and now it can handle 7-36V at up to 1.5 Amps.
The nice thing is many buck converters have a bypass mode, when the output is lower than the voltage its trying to regulate, it essentally bypasses itself, meaning for some 12V devices finding a suitable current 12V DC-DC regulator means you can modify your devices to be much harder to hurt,
personally I prefer this method to the regulated external 12V option, but I can understand why its the norm, e.g. stuff you care about the warrenty on.
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