2004 A3 1.6 petrol shocks query.. .

I've the above model a3, 3 door.

It is the sport version. It needs new rear shocks. Given its age, I'd rather get aftermarket cheaper versions, but my mechanic has told me they aren't available as its the sport model. I like my mechanic but I find this hard to believe. Its not a Ferrari, so can't imagine there is no aftermarket alternative

Can anyone shed some light on this?

Cheers.