I don't think those actually exist. Other things maybe but not this. Let's keep this somewhat serious, thank you.
You can't blame them! Why should they put up how-to instructions on that website? That's like providing a map of a lava tunnel... the path changes constantly and you're *ss is going to get burned!
No disrespect to the dead - but - tombstones do in fact make great structure! I grew up wind drift fishing for walleye in a reservoir in Indiana that - when gravel turned into more solid structure (that was in fact a cemetery) we got excited because the odds for a bite increased substantially (and happy to hit the right spot at all as this was before fancy electronics)!
