Thanks for the picture! In order to recommend a replacement I am going to need some measurements of your Apollo Half-Time Convection Oven. The High Pointe RV item # HP99ZR you were looking at might fit depending on the cut out dimensions for your microwave. It measures 20-1/2" wide x 14-3/4" tall x 18-11/16" deep and has a trim width of 24".
If you could email me the dimensions or comment in the box below of your microwave or cut out I would be happy to make a specific recommendation for you. view full answer...