Best keyboard cleaning method and can I buy replacement keys?

I recently spilled some soy sauce on my MacBook Pro. It wasn't enough to do any real damage (that I know of), but it was enough to make my keyboard smell like sushi and cause some keys to stick. A few were also making awful noises.

Initially I was popping off individual keys with my fingers to clean them, and then I looked up how to safely remove keys by using a screwdriver to unhook them. After I removed all of the keys, I used iKlear, cotton swabs, and rubbing alcohol wipes to clean up the mess as best as I could. I think I was able to reduce the odor and The keys aren't sticky anymore.

I was going to use an ifixit guide to get to the upper case to see if I was missing anything, but I didn't have the proper screwdriver to remove the battery. I'm pretty sure I could handle the disassembly, but I'm not sure that it is really necessary.

My real concern right now is that one of the keys got damaged when I removed it. One of the hooks that connects the scissors mechanism to the key is chipped, so the key doesn't sit right.

I would like to replace the key, but ifixit doesn't sell them. Is this a part that I am able to purchase?