Hey Henry, I’ve never been to Mauritius and actually had to look it up to find out where it was. I saw photos. Amazing. Although I can’t give you any specifics or recommendations, I found 2 sites that you may want to check out.. http://www.tourisminmauritius.com/tourist-attractions-in-mauritius/scuba-diving-in-mauritius.html
and
http://www.gov.mu/portal/site/Mainhomepage/menuitem.cc515006ac7521ae3a9dbea5e2b521ca/
Good luck and I hope that someone on Divebuddy will be able to help you out!
Take pictures and post them on DB when you get back. I may need to add it to places Greg and I should visit!