Hey, welcome to the forums, for requests, you don't have to make a new topic for each cover, a singe topic for all 4 would be a bit better.I found this but its not that high resolutionhttp://www.sega-mag.com/jeux/cover/Megadrive/Turbo-Outrun-Megadrive-EUR.jpg(also do you have a YT channel? I think I recognize your icon from somewhere)
Hi there, Segaretro.org has raw scans of Turbo OutRun and Technocop that aren't bad and Crusader of Centy is on the main site. I don't think Wolfenstein 3D on Genesis ever had a retail release although I did find a scan of a MD box with mostly english text that would be a good starting point for custom box art. All my finds are linked below. Hope this is helpful!