Hi Alan,
I can't help very much as I didn't get any replies to my post and I dropped the topic as I drifted off to other things. However I have just done a search of RootsChat for Mauritius and there are quite a few previous posts on that country which may be helpful to you. I would suggest you search for Mauritius under "Common Room" and "Other Countries". Also, as you might expect, there are a number of useful looking references on Google if you look for Mauritius Family History.
By the way if you are new to RootsChat don't be put off if you get a rather limp response to a query. This has happened to me a number of times but I have also had extremely useful discussions in this forum as well.
Hope you make progress.
John