Kenmore D/W Parts Needed

I am trying to find a part for a Kenmore dishwasher. The care guide indicates either model 363.15171, or 363.15179.

I can not find the model number in the usual places on the unit, and had no luck searching the Internet with the 363. numbers on the guide.

I need a push button for the front of the unit to make it complete.

It is an older 2 cycle cheapo, that has only been used a few times and has a lot of life left in it, and I'd like to get it looking as good as it runs!

I cannot figure how to attach pics

Thanks,
Tigertamer