How can I replace just the keyboard?

Unfortunately, I spilled coffee on the keyboard. After letting it dry and opening if the back cover, I inspected my laptop and cleaned the coffee stains it had. Fortunately (kind of) it started working again. After a few weeks of regular use without any issue, I noticed that my screen went go out in the middle of typing (OH NO!) and couldn't figure out the reason. I didn't know what was actually happening when the screen turned off. After troubleshooting, I noticed that my laptop was actually going to sleep. It would go to sleep after I pressed a key on the keyboard. Interestingly enough, I connected a mouse and keyboard via USB and I had no issues. I literally could use my laptop like normal if I used external keyboard and mouse. I confirmed that it was fully functional after a day of using it like a desktop by also connecting a monitor to it as well.

My conclusion (just assuming, could be wrong) is that the keyboard is/was creating a short which results in triggering my laptop to sleep. Super strange... I know..

Is there any alternative answer than replacing the whole bottom case?? Can I just replace my keyboard?