If they are the vectorized ones made by Man_Overboard, they have missing detail and some spelling mistakes. Still good though. Star Wars is the only original one I have found above 853x1280, at Gizmodo. 1280 is probably fine for Kodi/Media Center, just image search Google for “Olly Moss Star Wars” using those dimensions.
Thats just a picture I have that i googled of all three of those posters together, i have the original ones i got off him