Thanks for the preply
I have been in contact with Cameras Underwater. A lot of places do a ploycarbonate housing by Ikelite. The depth rating is 60 mtrs. I advised that I had my compact camera, which has a depth rating of 40 mtrs, to 55 mtrs. I was informed that it 60 mtrs was the max. Hence, I will keep looking as I ned to buy right first time. the problem is that the D5000 has not been in production that long. No doubt as time goes on, someone will bring out a deep housing for it.