Not going to find much in 16s. Everyone who runs STS uses 15" wheels and tires because there is a bigger selection of tires to choose from.
But if you want to stay with 16s: 215/45x16" Falken Azenis (old style - Rt-215), I think Kumho MXs also come in 16s, Toyo T1S in 205/45x16"
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