I don't think so! Selenium cell in what? That cheap sensor is actually a much better light sensor than the selenium cell in most old meters that use it. However, you would ended up redesign the entire meter.
Silicon photovoltaic cells would be easier to adapt. They are available in a wide variety of shapes and sizes, and can be salvaged from calculators and other battery free devices.
No. A selenium cell is a voltage producing device. What you link to is a device that has to be set at voltage to work, like a light dependent resistor or diode.
The best substitute for a selenium cell would be a silicone solar cell. Quite the same..., but with other material and somewhat different characteristics.