I have finally found an AIP cmpliant alternative to cow milk. It is called chufa milk. The milk is made out of chufa / tiger nuts and water. Tiger nut is a root vegetable and not a nut. The milk gets creamy and tastes like almond milk. The milk does not seems to be possible to heat at high temperatures but work well in coffe or tea. Here you can see a video of how I made chufa milk:

https://youtu.be/A-TbbJvwoAY

Good luck?