You may be able to recover the data from the hard drive, but it can be costly. Not nearly as costly as it was just a few years ago but costly nonetheless.
Western Digital has a list of recovery experts.http://support.wd.com/recovery/index.asp
Click on your location at the bottom to get a list of data recovery experts. You can call / email them to get a general idea of what it may cost. Tell them how the drive was damaged to give them a better idea. Some may or may not give you estimate. Some data recovery experts have general pricing on their websites.