ML - No experience myself...
You've probably already done some due diligence - to save anyone else that may be interested...
Google - Busom Delight - a sole hit in 2021 on a site that promotes BB -
however I can't see if this states she does or does not provide BB as fuller details require membership of that site.
UKP from 2017 has a thread where SP offered anal virginity for booking of £200 - subsequently the offer was retracted
https://www.ukpunting.com/index.php?topic=151710.msg1655958#msg1655958 AW feedback (mostly positives with some disputed comments) - to be fair to the SP these are all displayed and the negatives are robustly disputed.