Amsoil has a few that retain a very high zinc content. Their descriptions usually mention "older vehicles" or "pre-2007".

Their Series 3000 5w-30 HDD diesel oil has something like 1200-1300ppm of zinc, last time I checked. I'm out of town and can't double-check my records at home.

Amsoil source & info page.

Most oils, even diesle, have gone down. It's difficult to keep up with the changes and finding exactly what the "current" ones have.