For what it's worth, I had once linked to several Find A Grave memorials which mysteriously disappeared shortly after Ancestry bought the site. Apparently a contributor who was disgruntled about that transaction had decided to remove his work from the site. I wrote to Find A Grave and inquired (don't recall the exact process), and a helpful sysop quickly restored the memorials the member had deleted. So apparently they don't disappear altogether, at least not immediately. I don't know if just a name and a cemetery is enough data, but you could give it a try.