Famous Historical Figures Caticatures

I am preparing an open access textbook that I want to include some images of famous historical people, however, I do not want to have to get copy write approval for using any existing images. I would like to pay for someone to prepare new funny caricature cartoon images of the famous historical people.
There are 10 individuals initially.
The content for the course/book gets quite heavy, so i want the caricatures to be humorous and stress-relieving.