Wrong separator?

Moin moin, my new Volvo unfortunately had no luggage net. So I bought one of classified ads, photos top, 50€ with shipping, what should go wrong. I just installed it. It fits perfectly to the seats but the bar is good 5cm too short. Are the cassettes on the V70 and V60/XC60 identical and only the poles different? The seller wrote now that it was a garage find and he had asked Volvo for it. In the absence of a findable part number on the nets (si Looks like there was a sticker on it, but it’s missing now) the assignment is of course not quite easy… Could you change the bar at reasonable cost?