Underwater Camera Housings

Is it possible to build an underwater housing for a Canon PowerShot A520?

I would like to be able to take photographs at a depth no greater than 60 feet. If you could direct me to some plans or a book about the subject please do. If there is an underwater housing for this camera how much does it cost?

Public Comments

1. Yup, they sell the waterproof casing for this (40m I thnk) Cost S$370 which probably works out to <US$200 Model is Waterproof Case WP-DC60 (A510 / A520) http://www.canon.com.sg/index.cfm?fuseaction=digitalcamera&prod_type=accessories
2. My friend put hers in 3 ziplock bags. She's a friggin daredevil.