This is an internal frame for this product - https://www.lttstore.com/products/pet-cave
I designed and printed it so my cats won't crush the shape of a monitor and disturb my gf (pet cave is sitting on her table like double monitor setup)
If you have the same problem - here you go!
Tho it's a lengthy print with some assemble and hardware required
You'll need to print:
2 of each frame pieces, one normal, the other mirrored (so the frontdown, frontup, backdown, backup)
24 threads and 12 threadcaps
Assembly is pretty straightforward, but you'll need some hardware - 24 m3x15 bolts. (you can also just glue the pieces, but it won't work with PETG)
Also, I recommend printing one test set of threads and caps to figure out your tolerances just right.
The author marked this model as their own original creation.