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
Lego 7996 Sale Online, 54% OFF | www.geb.cat
4DBrix - Train
Ultimate Double Crossover
4DBrix
LEGO MOC Costum Double Crossover by Brick Forge | Rebrickable - Build with LEGO
Ultimate Double Crossover
Lego Double Crossover Track on Sale, 52% OFF | www.geb.cat