dnd 5e – looking for a way to protect myself against divination with the least amount of ressources

I am a fairly high-level wizard. I could learn mind blank or nondetection, or use an amulet of protection against detection and location, But 8th level slots are too valuable, burning 25gp every day is annoying, and I don’t want to use an attunement slot on this. Is there anything that I can do? I was thinking of using the simulacrum of a monster or summoning and binding an outsider with the right ability, but the simulacrum ability would have to be at-will or not be a spell because simulacrums don’t get spells back, and the summoned outsider must be cr 9 or less. Is there anything in the monster manual that would fit? Or any other solution I could use?