Scott I am not sure about the original box art being different from the reissue as I have not seen the original kits, but in the past Tamiya reissues have tended to stick with the original box format.
The Cartograf decal can be ordered from HobbyLink Japan using their very efficient spare parts service. I ordered a spare decal sheet among other parts for the Kawasaki 1000 and the Cartograf sheet arrived in several weeks and it was reasonably priced
Follow this link to HLJ spare parts service
http://www.hlj.com/faq/q41.html
Andrew