These are the parts that I ordered from the website "Kia.parts" to do the work above.
Pull Handle - Kia (81254-3S000) $4.95 X 1
Door Trim Panel Screw - Kia (12492-05123) $0.99 X 2
Handle, Inside Retainer - Kia (14910-05000) $0.88 X 2
Trunk Lid Trim - Kia (81752-2T000) $77.44 X 1
The trunk lid trim would be optional I suppose. Depending on how you are able to cut out your current trunk lid trim you may not need it at all.
Looking back, I didn't really plan out my cuts as well as I could have and ended up making the hole too big in the K5 trim and cutting the Optima liner a bit too small.
I figure I have a few options that I'll likely explore in this order:
(1) Trim it up a bit more a be happy it works as intended.
(2) Try to find a material that can bridge the gap between the two layers to create a more seamless look.
(3) Order another trunk lid trim and make more precise cuts.
I will post any updates as they are done.