Here is a very different concept in gas hotplates. Glem Gas have designed 2 ranges of individual single gas burners. You can arrange them on your benchtop however you wish.
The Origine series is made from Monolite Ipergres®, a warm and natural material never used for this purpose, it reflects the symbolic link between the
human being and the earth. “Origine” breaks the rectangular
schemes of cooktops, and rediscovers the basis of the object’s foundation, playing an central role in changing the way we view the kitchen. It changes the shapes. An important dimension makes it look more like a brazier rather than a single gas burner.
The single, round gas burners are ceramic and are available in 12 different colours – including mustard, cobalt blue and graphite – they are resistant to scratches, shocks and spills and are also dishwasher safe. The control area is available in a chromed satinised brass with a black ebony ****, or a bronzed brass with walnut ****. Really compact and quick to use.
Stellare -
As an alternative to the Origine burners the ‘Stellare’ single burners use more angular architectural lines to result in a more futuristic style. The sleek Stellare burners feature black enamelled cast iron pan supports with a stainless steel control area and black satinised aluminium ****. The cast iron plate is removable for easy cleaning and is also dishwasher safe.

All Origine and Stellare single gas burners are available in three different burner sizes including a smaller auxiliary size, semi-rapid or more powerful triple ring depending on your requirements.
My only concern with this would be would the heat of the hotplate damage some benchtops?