But it was.
So, on my way to play games with my gaming group, I stopped and picked up a larger case. As well as enough boxes (yes plural) for Twilight Imperium 3.
I had a hard time finding images that I liked for the cover. But finally settled on these two. I believe they might be from the newer PC game. But they look nice and will do the trick.
Luckily, I was able to find a .png file of the Space Hulk logo and I didn't need to rebuild it from scratch.
After printing it on some brochure paper and gloss coating it. I cut it out and sprayed the back with spray adhesive, as per usual.
It turned out great too! Everything fits in the box nicely as well. Though I may need to pick up some bubble wrap to help protect the minis a little bit more.