Got a hold of a dealership that was actually helpful. These are the P/N for our rotors on the 2017 ES. Front - 51712C1000 Rear - 58411G2300. After some cross comparison online, our front rotors are the same for the 2016 Sonata Hybrid Limited and our rear rotors are the same for the 2016 Elantra Sport.
These are the EBC rotor part numbers (what I would equip mine with) that should fit the 2017 ES. Front - GD Sport (GD7645) Rear - USR Slotted Rotors (USR7630).
Now time to cross-compare the pads and see what the RedStuff P/N will be. Stay tuned!