More gloom and doom. My 1998 Omega 3 litre car has just failed its MOT with 2 rear broken springs.

So, I can replace them with original Vauxhall parts and use Tradeclub which brings them down to £450 - so I am told - or use an equivalent.
Don't get me wrong, I love sporty cars but I want to keep my Omega as original as possible and want to keep the same ride height etc.
So, if you were me which brand would you go for or should I stick with the Vauxhall ones?
Many thanks you lovely people....