Jenn- Air Microwave dor glass replacement

I was given a brand new Jenn-Air Microwave because the front glass on the door was broken out during construction of the privious owners house. Do I have to buy the $306.00 replacement door from the company or is it possible to replace the glass myself with a cheaper piece of glass?

According to the breakdown diagrams this door is not serviceable, so the only solution is to replace the whole door.

Gene.