Low price dslr housing?

I'm a sophomore in high school planning on going to australia as part of the national geographic high school expeditions this summer. We will be snorkeling on the barrier reef for a few days and I would love to get some good underwater shots but so far I've only seen housing like aquatech and ikelite which are too expensive for my budget. Are there any better low-cost DSLR camera housing systems out there? If not, does anyone know of any discounts, used/refurbished housing systems, or low cost underwater cameras? (I have a nikon d800)

I think you would happier with a smaller lighter camera than a big heavy DSLR underwater. Take a look at some of these:
http://www.bhphotovideo.com/...4052359761

There are NO underwater housings that are inexpensive that you can trust your fine camera to while snorkling.

Such housings cost from $1,200 and up and you need an additional "lens port" for each lens you intend to use underwater.

As AlCapone has suggested, get a nice underwater camera like the Nikon Coolpix AW 130 or the Nikon 1 AW 1 which uses interchangeable lenses

These are the under-water housings specifically designed for the D800/D810: http://www.bhphotovideo.com/...10+housing

With the cheapest model being $1,000, I'm assuming that it's beyond your budget. And let's face it, these housings are for diving and all you need is one for snorkeling. You probably can get away with a generic bag or housing such as these: http://www.bhphotovideo.com/...4283022103

Nice expensive camera you got there. Are you really willing to bet it's life on a $20 dollar sandwich bag?