Roof rubber torn

Hello, unfortunately, after many days of research I found no comparable case in various forums. Also my current Volvo dealer in Stuttgart could not report about this. Overnight I had a small crack in the outside roof seal on the front roof segment. Can happen – I thought. Since the seals are not available single at my model year (EZ02/2008), I would have to order the package from all three seals for the left side (400,- And in order to avoid deformations on the roof, all seals on the right side are to be exchanged in case of accident! Cost estimate according to Volvo: 2 x 400,- + wages, approx. 1200,- €. Since I already had side panes adjusted this year, new climate capacitor installed, four new summer tires as well as TÜV + large inspection had to be made, I am looking for a small solution. And since water does not penetrate into the interior, I was recommended by Volvo to seal the saddle. It’s about 25,- €. Now my question: Has anyone been able to gain experience, whether and how long does something like that last? Or has someone had the same case already. Is there a better price for these seals? At Scandix, unfortunately, I found ncihts. Greetings…