Adding Keyless Entry To 2018 SR

Hello All,

I would like to add keyless entry to my 2018 sr double cab Tundra. Doors currently can only be locked/ unlocked using the keyhole on driver's side door which is inconvenient when letting kids in or out through passenger side. Also I worry about being locked out if someone parks too close or the single keyed lock/ door is damaged. Google search leads me to believe adding a keyed lock to passenger side door is not an option.
So could I have a Toyota dealership add keyless entry at a reasonable cost? Or would an aftermarket company be better?

Thanks in advance.
-TW