These cameras aren't built with precision in mind, but everyone knows the first step down the snowy mountain of amateur photography is adding a tripod. Modeling around these Instax Minis is a pain for a hobbyist like me, but I think the concessions I had to make will allow you to use it with multiple models. I built it around the Mini 7+.
This was designed to print at 0.2 layer height without supports. There's a sacrificial layer to allow bridging around the hole that accommodates the ¼-20 bolt, all you have to do is run a blade around the inner lip. I set it up to use tensioner from a cold shoe adapter, but you might be able to use a ¼-20 threaded nut too.
Edit - forgot to scale it up, I was modeling it at 1/10 size because of bad habits.
The author marked this model as their own original creation.