As someone that has explored the depths of so many acapellas - I would really implore you to explore the vocalists in your area.
In 2022 it’s really possible to make a professional recording on a budget. UAD with Unison technology + a nice mic (AKG414 is my suggestion for a vocal mic that works with many types of voices and relatively affordable) and you have everything needed to make some new music. And without sample clearance/publishing/music business issues.
I don’t mean to come across condescending at all - more that we are in the golden age of affordability regarding recording - go out and make something new. There are so many social issues, beautiful moments and of the time issues to explore and to be inspired by, and we need music that reflects the current day.
Don’t let 90s RNB publishing owners have any say in your musical output, enjoy what I feel to be the most satisfying aspect of music making; make something with a songwriter or a vocalist that is brand new and reflects where you are in the world and how you see it. It’s endlessly rewarding.