I'm using a jack that was originally in an E39 5 series.
P# 1 096 040. 1 aka 71121096040
ECS sells these new:
https://www.ecstuning.com/b-genuine-...k/71121096040/ You can buy them other places, like Turner, for similar prices.
I bought mine used for $50 off eBay.
As for the comments on these little jacks being sketchy, well, they ALL suck. The BMW ones at least have a block that fits into the jack point, stabilizing the top point. But these tiny spare jacks are all horrible no matter what brand of car. I would never use one if I had any other jack available.
I still need to source the cute little folding wheel chock that BMW had in some kits:
https://www.ecstuning.com/b-genuine-...k/71121507292/
That BMW torque wrench is cool. But I would rather have a longer breaker bar and socket. A bit more flexible.
And don't forget a decent tire plug kit and a compressor with some optional slime sealant.