Bosch 3397118909 Wiper Blade Aerotwin set AR607S upgrade kit - Length: 600/475 (Automotive)
Actually, there are indeed retrofit wiper for the Vectra. But they are also attached to the Omega B. (There is, however, on the passenger side in the bottom quarter of the disk of the wiper about 4cm from, due to the strong there bulging disc) I boug