3.3 RWD square specs request

What would be the offset front/rear required to have a flush wheel without spacers and keep the tires square. I have stock wheels with the 20mm spacers all around to make flush but staggered wheel setup. I want to make it so I still have flush with staggered offset but using a square tires setup. 8.5-9 wheel max. Only used as a touring car/daily at the moment. Like the Aohdan AFF7 as it looks stockish. Really like the stock wheel look.