when i look this one up i get complete door only
but
seen this before and its a pig till you know how
now this is from memory
there is a small hole i think on the rear of the door but look around till you find it
this is to allow you to put a small screwdriver in to release a latch to allow you to hold the door outer trim middle and turn it anti clockwise to unlock it
the screws are under this cover item 1480
thats assuming this one comes to bit as they list as a complete door as said above
Dave