Jef if you cannot get the correct file you could fit a simple on off switch. You may have to go to a dealer for them to enable the fan automatically.
In my view it's better to have a switch, as the number of times you actually 'need' the fan is pretty limited (unless you live in London perhaps) and the stock setup runs the noisy thing pretty much the entire time otherwise. I simply switch mine on when I am stationary for what feels like too long and haven't had skip-fire since fitting it, including a sweltering day stuck in a jam around Brussels for ages.
