The Mathematical Institute of the University of Oxford has produced a set of six posters called “C. L. Dodgson, Oxford Mathematician,” which are available for free download and, presumably, printing. Here is the main outreach site, on which you’ll have to scroll down to “Charles Dodgson,” or simply go here to download the .pdf. They are designed for “AO” paper (33.1 by 46.8 inches; 118.9 x 84.1 cm) at full size, but of course you can print them up at any size you want. The posters were conceived by Robin Wilson, with the assistance of Raymond Flood, Dyrol Lumbard, and Edward Wakeling.
Thanks to Stuart Moskowitz for alerting us to these!