Electronic images of the mandala in varying sizes are available on Don's page. Before downloading a Gohonzon image, I recommend reading the entire discussion between Charles and Ryuei because their exchange summarizes a lot of the issues.
Also, check out Cris Roman's introductory info about the Gohonzon in his book, chapters five through nine. In his provisional epilogue, Cris notes:
For those who would like to receive a Gohonzon, therefore, I would submit that either the Org or the Priesthood is a fine place to do so. I personally would never consider a Gohonzon that came from an organization which does not regard Nichiren as the "Dai" Shonin (great priest) because those groups tend to place him in a subordinate position to the historical Shakyamuni Buddha and, more importantly, place his Gohonzon in an equivalent, or even subsidiary, position to many other so-called mandalas or objects for meditation.
This, I believe, is totally contrary to Nichiren's intent and diminishes the import of his masterpiece, his Gohonzon.
A couple last thoughts about the Gohonzon: Because, as Nichiren said, and I reflected upon in earlier chapters, "I inscribe my life in sumi ink," I would be loathe to use a Gohonzon reproduced by electronic or digital means. This is because, at the depths of my being (and I stress this is only my opinion), I believe the Gohonzon is best created through the sincere efforts of a human being -- not by machine or computer. Call me a purist, but it is just what I feel and I would be lying if I said I could shake the feeling.
Also, because the Nichiren Shoshu priesthood has some 700 years of experience and tradition dating back to Nichiren in their production of the Gohonzon, I would give their scrolls a slight edge over the Org's with regard to the intent, the spirit, with which they are created.
The Org's Gohonzons look very nice, but the truth is their inception came from a schism that was borne of great animosity. To continue to spread Nichiren's teachings, the Org was forced into a situation where they had to create their own Gohonzon.
Though I have no dispute with the correctness or efficacy of their creation, I am concerned that it emanated from such disharmony. Nonetheless, because the Gohonzon itself is such a perfect, objective manifestation of the Three Thousand Worlds and the essence of the Lotus Sutra, believers who chant Nam-myoho-renge-kyo to a scroll obtained from either the Org or the Priesthood should derive the full benefit of which Nichiren so eloquently spoke.
This final point, to me, crystallizes the argument for why I believe it is so crucial that Unity become the battle cry of all Nichiren believers.