Kenmore use to make one at 9 7/8". There are a lot of small ones but more about 10 1/4". Refine your search by cu.ft. ( 0.7, 0.6 ) to less than 1. tons will come up. They will also be small in watts, 700.
Or visit your local kmart, home depot, wallmart etc, sometimes drug stores will carry tiny m/ws. IE Danby makes a coupl at 10 3/16".
You may want to relook at your cabinet- if the opening is 9 3/4, can you remove to install or cut cabinet or face trim. Also some of the ones that are meant to set on counter have removable feet (or pocket your shelf).
