There are a great many face stimulus sets around, but the problem is that the older sets have a much lower resolution than the CFD resolution. However, there are a few out there. I have added some links to get you started. The 2015 FERET programme in the US has captured the images at 14.1 Megapixels resolution, and the Glasgow 2010 paper has images at 6 Megapixels.
Thanks a lot Bob, I've also found the MR2 database, which is at about double the resolution of the CFD (Creative Commons license too, which makes using it for demos easier!)
Hi! For anyone else seeking such a database, I have combed through all of the resources listed here in addition to numerous other sources in order to construct the Face Image Meta-Database (fIMDb): https://cliffordworkman.com/resources/
The fIMDb includes info or estimates on: number of photo sets per source (and numbers of neutral and other sets — e.g., facial emotions), number of subjects per source (with approximate sex distributions), total number of images, approximate number of viewpoints, whether the sources includes photos from more than one ethnicity, whether it includes more than one age group, whether meta-data are available, the photo category (e.g., posed, wild), the reference(s) for the source (e.g. DOIs). I hope this will aid others interested in conducting research on responses to faces.