Seems like the best place to put this - hopefully someone finds these useful...
Behold: the Giga-BAM
BE WARNED: these files are not for those with older machines. Why? Because these maps are at 1:900,000 scale in QGIS, and the
smallest of the maps is 21.6k x 12k pixels - call it 260 megapixels.
And then there's the 4.2 gigapixel (94,789 x 44,341) world map.
https://mega.nz/#F!paBmDKwL!VSmEVFAtC6wF1eKUUH3BVQ
Unfortunately my gaming rig couldn't handle exporting the entire world map in one go via QGIS, so I had to export 9 separate files and stitch them together by hand in Photoshop. This means there are some errors - shouldn't be more than borders etc being 3 or 4 pixels out - but if you need that level of fidelity just be aware of this.