They’re not quite hi-res but the best quality Young Indy Struzan artwork I’ve managed to find is on the Young Indiana Jones Music site.
https://www.youngindianajonesmusic.com/cue-lists/06-spring-break-adventure
Thank you! This helps a lot. Looks like some of them have been replaced with posters by another artist. Still, the ones by Struzan that are there are much better quality than I’ve been able to find. It’s crazy that some artwork by an artist like Struzan is so hard to find.