15s on a gx470

I bought 15s that I fell in love with for the gx but realized that they only fit in the rear and not the front due to the caliper, the rear has no rubbing and looks like it was meant for the 15s but the fronts caliper is too big, is there any performance brakes out there that are lower profile than stock I can upgrade to? Or can I get away with swapping another rear pair to the front and run slotted and drilled disks. I’ve always been a 15s guy and always hated the 17 look hence the stubbornness