Here are a few on-line places to look into.
They are all good sites, with good selections of cloth diapers.
Just a quick tip. If you want really thick cloth diapers to wear, you are better off using several thinner diapers stacked together. Really thick cloth diapers, are hard to care for, washing, drying are more difficult.
Good luck, and enjoy your cloth diapers!
https://www.babykins.com/
https://www.changingtimesdiaperco.com/
http://www.angelfluff.com/index.htm
https://www.adultclothdiaper.com/
https://www.llmedico.com/adult-cloth-diapers/
https://www.baby-pants.com/diapers.php