Portable Kenmore dishwasher model 665.171 control panel replacement?

I have a Kenmore portable model 665 171. Recently it stopped working mid cycle. I have reset it several times and it worked for a while. Now it has stopped cycling through. It will fill up but will not cycle. Also, some of the buttons no longer work and it won’t even permit me to reset. If I have to purchase a new control panel, where would I get it and how do I ensure that I am getting the correct one?