Abel touched on the main reason your friend is having difficulty getting unedited files: quality control. No wedding photographer in his or her right mind would let unedited files go to a client for ANY reason.
As your friend has discovered, prices for hi-res images on CD or DVD are all over the map. Some photographers include it as part of a package, some offer them after some period of time, others never offer them at all. It all depends on how the photographer has defined his or her revenue stream.
Weddings are a LOT of work. If you ask a fashion shooter, a product or food shooter, and a wedding shooter who works hardest for a $5000 day, they will all tell you the wedding shooter works the hardest. They take the most pictures, they spend the most time in post, and they spend the most time with the client. They need to pay themselves for all that time and about the only tangible thing a typical wedding client understands is the final print. So a lot of wedding photography is priced around the album and prints. Built into the album and print prices is all that time spent on behalf of the client, but not in front of the client.
The last time I saw statistics on wedding clients, they purchased the bulk of their imagery in the first 12 months after the wedding, with some residual purchases going out to about 36 months. But there is very little, if any, money made after 36 months. So your friend may have a hard time finding someone to remit hi-res imagery before 36 months. If they do, they will price it assuming that the client is going to try and have prints made by someone other than the photographer.
Just FYI, unless the photograher also supplies a document granting your friend permission to make prints from a supplied disc of imagery, your friend can't legally have the images reproduced. The Professional Photographers of America association spends a lot of time going after printing labs for this. It's very common these days for clients to walk into Walmart with a disc of images and ask for prints. Without a copyright release they can't legally do so.
All that said, your friend should be able to find someone that can meet his needs. He just might have to pay for that flexibility. $3000 for a wedding package with a hi-res DVD is not a bad deal at all. Unlike most other areas of professional photography, a wedding is not something that is easily re-shot. It pays to have someone who's good at it. 6 months, a year, five years, twenty-five years down the road, what do you have left from your wedding except the album and photographs?
People who do stupid things with dangerous substances often die! -me