What are the tombstone candy bars?

There's no candy bar called "tombstone." It's possible you're thinking of:

* Tombstone Pizza: This is a popular brand of frozen pizza, not a candy bar.

* A specific brand of candy bar you've seen: Maybe you're thinking of a candy bar with a tombstone-like design, but can't remember the name. If you can describe the candy bar (colors, packaging, etc.) I might be able to help!