Re: 996 Targa Owners
I had a 996 Targa with standard suspension and also believe there was no sport suspension on offer for the model.
However, I'm sure you can find aftermark shocks with stiffer springs if that's what you're after, although I would have to agree with previous comments that the model's definition is more relaxed than a coupé and therefore probably not well suited to a stiff suspension set-up.