Jeroen's 916 may be a built up 1/43 resin Mini Racing 916 kit. I have one that is not built. Very nice. They offer some other 914-GT kits of Lemans/Sports Racing and Rally cars.
In the past a company named Pit offered several 1/43 914 models, but these have become hard to find. These were well detailed but fairly difficult to build. I built their Sonauto Lemans 914 and it came out pretty well.
Check the following Grand Prix Models site and do a serch for Porsche 914 and Porsche 916. GPM is a major specialty model supplier. Excellent web site and excellent service.
http://www.grandprixmodels.co.uk/Mike