those look amazing, where do you get the art to make them? scans of existing boxes?
For the most part, yes. There are plenty of pics of box art and such but some are hard to find at high enough resolution to print very well. The search for these images is what led me to the INTV AA board about 3 years ago. Been lurking around here ever since.
The sides and back of the boxes sometimes required me to do some typesetting and scaling of images to most closely match the originals but mine do have some differences.
The cart retention I made was copied from the original Coleco boxes with an added manual pocket to keep instruction and overlays from getting damaged by moving around too much:
Here is the cart retention piece and manual pocket from the Lock 'N' Chase 8K Update box before construction:
Here's what they look like mounted in a Blix box before completion:
Here's how they work after finishing. I mounted these in the destroyed Super Pro Football box I restored since it was missing the original retention piece:
I really like the pockets for holding paperwork and not letting things slide out the bottom flap of the non-gatefold boxes.