Aah, so I was right! Thank you!
I remember that I got it from Fran`s home village, and after checking it indeed is found from there. You go to the "second floor", past the salve making outpost to the other, and there is this odd floating diamond chest. Haste spell can be found from that chest.
[video]https://youtu.be/6-nEI4BqpIg?t=38[/video]
Oh my god. Thanks a bunch, couldve sworn its somethinh I cant buy.