Okay, having said yesterday that the Sven Vath/Miss Kittin version of Je T'Aime was hard to find, I've found it. Here it is.
It was released in 2001. This is definitely the campest version of the song. Interestingly, Sven Vath has included the sort of 8-bit bleeps that the likes of Crystal Castles are championing now. I'm not sure whether the male vocal is him singing, or a sample, because it sounds very like Gainsbourg. Miss Kittin is great in the Birkin role.
As much as I love the daft French car chase video above, with Sven Vath looking scarily like Rutger Hauer in Blade Runner, the best Je T'Aime for me has to be Nick and Anita - their voices suit the song and the chemistry is there.