Hey Stef,that is a really nice idea.I would love to see what you come up with.I think it would be cool for a modeler to scan their completed box art and make it into a poster.I might look into doing that.( If I can ever finish a build!!!) Just kidding.
Oh yes, this would be a sick awesome project, though I leaned the hard way that doing it all on one's own is impossible. I would like to organize the modelling community in helping me source hires scans of the 3500+ domestic model car boxes I've catalogued. In looking through everyone's kits in the "show your stash" thread here, I see there are hundreds of classics just waiting to be digitized.
In the meantime, you can see the images I've grabbed off Google here: