[iLegends73]

now i have an idea for u on this but im not really sure how it would work. 2 suggestions
1) go to a sports collector shop (or maybe walmart) and look for those plexiglass cubes that they put autographed basketballs in. since u have just MU's and star wars it shouldnt be that snug. then take measurments of the insides and have home depot cut some plexiglass for u and make shelves u can hot glue in the inside of the cube

2) get plexiglass cut for your shelf then grab some hindges that can work for plexi & wood
then drill em in place with screws. also so it wont just fling open, grab a hook latch or some strong magnets and put one on the door and one on the shelf

like i said it might not work but those where just some ideas i got from reading your post,
best i could think of. let me know if u decide to do any of it