The two listings below have all the info required. The AJ Madison listing has pictures of all the parts needed.
The Ebay listing is for the part# that I used on my install.
If one of you do not buy this & the microwave listed on Amazon, I probaly will !
27" Convection Microwave Oven Trim Kit: Stainless Steel
Amana AST2780AS 27'' Microwave Oven Trim Kit Stainless | eBay