Would a door snake work? It's just a long cloth tube filled with something. Similar to the ones you found except it only goes on one side. The down side is that it's not attached to the door in anyway. Everytime you move the door you'd have push it up against the gap again. This also means if everyone leaves the apartment youd have to leave the gap open.
You could always diy it. If you're not concerned on how it looks though I've had decent results with a rolled up towel or two pairs of jeans. It works better if you only shove one leg at a time into the gap. If you're using two pants put them where the foot holes are facing each other. So the hip part is on either end of the makeshift tube.
Roughly four months after being run over and rendered bed bound my mom is taking the next step in her recovery. Literally. She's been okayed to start walking. She recently went to her first physical therapy session and is working on getting that leg strength back. Still a ways from walking even with a walker but hey progress is progress.
My lemongrass plant that I tend to neglect is showing signs of life. Seriously I haven't changed the pot or soil of it in at least two years now. Not to mention the amount of times I forget to give it water. It's a miracle the poor thing has lasted this long really. But today I noticed some new growth so that's cool.