Aloha Sheryl, I would do a google search on Grace and Kahala keying in as many ways possible:
mele keau waianae oahu
grace kahala keau
I would also click on images to see if there is any available (more times than not there isn’t any image available you should still look because you never know if there will be or not unless you look).
Also, click on the graves on the left side bar and see if any of the people you are looking for are recorded.
Check LDS, Ulukau, any of the research sites available, I have most of the links on the side bar.