I've got a project that I've been wanting to do for a while, but I'm having some trouble getting started.

Problem: I need to find a monochrome (land white, oceans/lakes black, or vice-versa) real-world Earth map projection that I can overlay onto Google Earth for a precise fit.

Purpose/background: I'm trying to create a world map for the Rifts RPG, a post-apocalyptic future Earth in which sea levels have risen and a new continent, Atlantis, has appeared. Coastlines have changed, but the locations of major features are the same. My plan is to make this as a vector map with as much detail as I can find in the many Rifts RPG books. This vector world map could then serve as a single, consistent baseline from which to create high-quality detailed regional maps, either by zooming in on the flat projection or by overlaying this vector map on Google Earth and taking a high-altitude image of the region of interest. This could also be useful for creating some virtual globes of Rifts Earth for some artistic planetary images, but that would be more of a "down the road" follow-on project.

The project plan:
1. Find a monochrome world map projection that can map precisely onto Google Earth.
2. Vectorize the projection (Inkscape has a nice tracing function for this).
3. Adjust the vector map to conform to the published Rifts canon maps.
4. Profit!

Now I can find plenty of monochrome Earth projections, but none of them seem to be a good fit for Google Earth when I overlay them. The best ones develop a pronounced offset such that either the regions outside the tropics are a good fit, or the regions inside the tropics are a good fit. I can't find one that does both. Any ideas?