In her weekly Better Allies newsletter, Karen Catlin highlights the importance of using stock images featuring people from underrepresented groups.
She maintains a list of sources for such images, to which she has just added a collection of public domain images from the Consumer Product Safety Commission of the United States federal government.
I wish these images weren’t all focused on the disabled people’s use of their legs, since there is already a weird misconception that to be disabled means you are in a wheelchair for a lot of people, but this is a good start.