You are likely able to do this. I have reviewed the wiring schematics, and from what I see, you simply need to supply two power supplies the the two switches on the seat.
Now, the schematic shows the original location where the fuses would be. Since the vehicle wasn't ordered with a power passenger seat, chances are they will not be there. So, you will likely need to find a power supply and then using an inline fuse (which you can get at any parts store) and provide a 20 amp fuse for the lower seat controls and a 30 amp inline fuse for the lumbar control.
Take a look at the wiring schematic I attached. I had to cut it in half to make it readable. I did overlap the two halves so you can easily follow it.
Let me know if this helps or if you have other questions.
Images (Click to enlarge)
Tuesday, July 21st, 2020 AT 5:19 PM