Humidity project - humidification advice needed

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I am starting a project to build a humidor cabinet (approx 30-40 cubic feet capacity, to be finalised ,maybe 5”x3”x2”). No drawers just 2 or 3 sliding shelves for storage of boxes. The cabinet making side of things is being handled by a good friend who does this for a living (though not humidors yet!) but we have no idea about the best humidification option.
 

Based in the UK it will not be temperature controlled as will be in a very stable environment but I would appreciate some advice on the best/ easiest set up that could be Bluetooth/Wi-Fi controlled to humidify the cabinet. 
 

I have seen that a lot of members used the aristocrat humidifiers, are they still available and so they ship to the UK? If yes which would be the likeliest candidate for my needs. If no do any FOH members have other suggestions for European suppliers. 
 

Thanks in advance for any input.