Bastens - We are lucky enough to have one of the LEGO City Train Track Splitter 7996 which is now retired. That being said I wouldn't recommend spending over $250 to buy
4DBrix - Train
LEGO City Train 7996 Double Crossover Switch Track - Why so much? - YouTube
City - Train Tracks [Lego 7996] | Lego trains, Lego city train, Lego train tracks
LEGO CITY: Train Rail Crossing (7996) for sale online | eBay
Peeron: Train Rail Crossing for RC Trains (#7996-1)