Hey there, it's funny that I found this forum.
I've got a ridiculously large scan of the coverart of Monkey Island 2, without any letters or added taglines or anything.
I also have a ridiculously large version of the Grim Fandango concept art, (the Rubacava one) and the Maniac Mansion Edison painting.
I just don't know where to upload. The files are like 90 MB in size uncompressed.
I've got the Monkey Island 2 and Grim Fandango one hanging in my room! ^^