Microwave Oven

Can you tell me the procedure necessary to replace the outer door on this microwave. The handle is broken loose of the door and I need to replace the door cover.

What is the rest of the model number? It suppose to be 2 more letters and a digit.

Gene.

Gene
The complete model # is: KHMS145JWHO. The last three letters only designate the color and I didn’t realize you needed that.
Thanks in advance for your help
Dick