S60 Heckspoilerlip of the “R”

Hello, the day before yesterday a S60R was actually parked next to my moose! First I didn’t finish with sabbers… (the “R” is a rarity in Austria, you have to know) Furthermore, I noticed this beautiful very discreet tail spoiler lip (on the tailgate). Immediately this “must have feeling” I found nothing in the net about this spoiler lip. Maybe someone knows if it is possible to retrofit this part on every S60? Bzw. how is the lip fixed? gt? Glued, or screwed? Someone might also have a clue about costs?? Thank you so much! LG, Nordisk.