Omega B Facelift 2003 stronger springs VA possible?

Hello guys, I have a facelift gasoline Omega B Caravan 2.2 Editon, engine Z22XE. A few years ago, when there was no winter and it was nice and warm, I had a JMS front spoiler installed, which was a lot more often avenging, especially this winter. The Omega is quite soft at the front and dips quite deep when braking. Was beginning like this. Unfortunately, I have no idea what kind of shock absorbers and springs are installed on the front axle. Someone knows, o b there are stronger springs and/or shock absorbers for mine? The car should NOT be lowered. Have already enough problems. Thank you in advance.