Actually, I found some new Katzkins on ebay for cheap. I was studying those pictures until I figured out that the rear seat of the s has an arm rest while the i does not, so that's the difference. Fortunately, I found another set made for the i, so I jumped on it for $94.99!
I don't want to go through the expense of swapping out whole seats. It would be nice to have power seats, but I'll do without. I'm just trying to make some nice improvements for little $$$$.
2012 Mazda 3 i Sport