7 x 12 Delta Steel wheel weighs 15lbs.Have you looked at ITP Delta Steel rims? I see you want to keep the factory look but it may be a cheaper alternative for you, and still quite close to factory.
They do however weigh more than OEM wheels and have a greater offset, 1” wider so a 2” track increase overall.
6 x 12 OEM front wheel weighs 10lbs.
7.5 x 12 OEM rear wheel weighs 12lbs.