The first three Star Wars movies (we know them as episodes IV, V, and VI) were released in the years before CGI; special effects were all photographic, practical (models, puppets, stop-motion), or hand-drawn (e.g. rotoscope). Despite the limitations, the story telling and suspension of disbelief all worked (not just for me, but for the blockbusting lines of fans at the time). Nevertheless, when CGI became possible and practical, Lucas decided to rework these movies and re-release them with scenes added or modified to incorporate CGI creatures, robots, etc.. This question: Modifications to the Star Wars original trilogy provides examples of some of the alterations.
Personally, I prefer the movies in their original form, but only the reworked editions seem to be in "official" distribution - when broadcast on network TV, etc..
My question: Do the original versions of these movies (either original theatrical release or original home video releases, pre-CGI) exist in licensed distribution? Have they been completely withdrawn in favor of the CGI editions? Are we ever likely to encounter them in either official DVD catalogs or TV broadcasts?