Hi Dulcificum. I've got two options: one 20g and the other 46g.
Although we've been using the
P4P+ for work, taking it to all kinds of remote locations together with other pro filming equipment, we've recently got the
Mini 2 for assignments when we have to travel ultra light (which is probably a different definition than you're meaning in this context). We mostly work overseas and so I've got a good collection of the various airline overnight bags from both economy and business class. A few of them fit the
Mini 2 perfectly. You might have some too, or else someone you know? Although we have dedicated bags for specific gear, they often come in useful for oddities.
Alternatively, at less than half of the weight - so 20g for an oversized one - we have several draw-string bags that will keep out dust etc, but offer little to no padding. A camping gear supplier would have them in varying sizes, if you don't already have a few of them. (We've used them for packets of food on long day hikes on location, attached to the outside of a backpack or inside if room.) If you're a careful person, thoughtfully putting things in your backpack to prevent damage - as different from "casual - I don't care" - this might well do. If not, a piece of bubble wrap (or similar) around it, held in place with a large elastic band, would offer extra protection at little extra weight. This bubble wrap addition might sound clumsy, but we use it a lot when having to carry a teleprompter pad with delicate breakable mirror glass in challenging terrain - and it's quick to get off/on and works well, with negligible weight.