Find those here:
Lithophane Boxes - https://makerworld.com/en/models/167267#profileId-183639
Picture Frames - https://makerworld.com/en/models/255230#profileId-271632
Everything should be good to print in the included print profiles, but do take note of the pauses for each plate. These are there to allow you to embed 8mm x 2mm magnets. The pockets are a little deeper and you may be able to fit 8mm x 2.5mm magnets.
I intend to add face plates as I design them, so check back regularly. If you have any requests, just ask! Also, feel free to change the colors to whatever you want.