Then I would invest in a DSLR, or better yet, a used SLR,film camera, one good lens, a macro 100mm or so, would be my choice and learn how to copy artwork, using my "recipe" I have here and save paying a photographer.
How large are these? If 8.5x11.0" then a scanner would be better and cheaper, Epson makes great scanners and for less than a camera/lens you would be set.
Rich