Check online databases for tattoo designs, both photographs of actual tattoos and graphics of potential body art. A website displaying tattoos will probably have several categories of designs. Browsing sections dealing with Hinduism, mysticism, India, deities and similar topics will likely produce images of Ganesh tattoos.
Explore books. Tattooing culture has made its way into publication, and there are now many books on the subject. These books can be procured online, at local bookstores, and libraries. Simply asking an employee should result in information on available titles, or at least some further help on where you can find what you are looking for. Besides books on tattooing, written works on Hinduism and similar subjects are likely to contain images of Ganesh. Although these pictures may not be of Ganesh tattoos specifically, they may provide some inspiration for future deity-themed body art.
Visit spiritualism-based venues and groups. Although they may not have images of Ganesh tattoos on-hand, businesses or organizations that deal with Hindu symbolism, such as stores selling serious mysticism pieces or groups focused on India's religions, will undoubtedly have access to images of Ganesh, and may be able to help you discover more Hindu images.