I've only tried the very old warpmymind hypnosis files before, and while very relaxing they didn't work.
I was renewing the ad-agreement with the Sissy Hypnotist and noticed this Diaper DREAM hypnosis file:
https://hypnosissyhypnosis.com/product/diaper-dreams-hypnosis-abdl-diaper-hypnosis/
Really curios about it as it would only improve my diaper dreams, not affect my behavior when awake. I may have to try it.
What files would interest you? https://hypnosissyhypnosis.com/shop-sissy-hypnosis/