Firstly, that is crazily over priced and is literally just the plastic housing, I saw one sell for less than a fiver on ebay just a few days ago with both fans and motor.
The twin fan from certain 16v GTi's or a straight swap and run perfectly well on the existing 8v fan loom, the VR twin fan runs a different relay module and wiring so that would be a no go for you.
Both items just run one motor and the 2nd fan runs on a belt from the first one.