Fibaro RGBW Controller, Mimolite, or the Qubino would work.
https://www.thesmartesthouse.com/products/fibaro-rgbw-controller-fgrgbwm-441
https://www.fortrezz.com/shop/mimo-lite
https://www.amazon.com/Qubino-Z-Wave-Controller-ZMNHWD3-12-24V/dp/B075825GZ5
These are all available on both the US and the UK Z wave frequency, so make sure you get the one that matches your hub. 
Shop around as prices will vary on both.
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