Drive errors/Discwarrior/Recovering data

I have a LaCie 250GB FW800/400 external drive that has recently taken a s**t.
I think it was disconnected/unmounted improperly. I use the drive to record audio for Protools. It's all .wav files with the protools session files (yes wrong forums but same issues). Unforunately I haven't backed up in a couple weeks, so getting the drive to work is extremely important, as this is my work.
I first tried Apples Disc Utility.
Verifying volume “disk1s10”
Checking HFS Plus volume.
Invalid B-tree node size
The volume needs to be repaired.
Error: The underlying task reported failure on exit
1 HFS volume checked
Volume needs repair
I then purchased Discwarrior 4. Which said
cannont be rebuilt, the orginal directory is too severly damaged
error codes 3004,2176
The Albot support site is down so no help there, and some emails to them asking of the error codes hasn't helped much either.
Anyone have some suggestions for software or I would even be interested in sending the drive to get the information professionally recovered.
Thanks,
Adam

Bad news - very sorry to hear it.
Having gone through something similar a while back, perhaps the following will help a little.
I have great faith in DiskWarrior. If it says it can't fix it, I'd be inclined to believe it.
1) I'd suggest you don't mess with the drive any further. Trying various file recovery programs might make the situation worse. If you do experiment, chose one that absolutely does not write or move data on the drive, but does a sector-by-sector write out to another volume. If the files were rerecordable with just a loss of time, then you could experiment, but if they are irreplaceable I'd get the drive data recovered.
2) If you're thinking of drive recovery, there are some companies that are 'cut-rate' and I'd suggest that this is not the time to go price shopping. I used Drive Savers as every source I checked said they were the best. They are very expensive; a few years back they charged $1500+ and I'm sure the rates have gone up.
http://www.drivesavers.com/
But maybe that expense is a lot cheaper than losing your two weeks work.

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    I have a LaCie 250GB FW800/400 external drive that has recently taken a s**t.
    I think it was disconnected/unmounted improperly. I use the drive to record audio for Protools. It's all .wav files with the protools session files. Unforunately I haven't backed up in a couple weeks, so getting the drive to work is extremely important, as this is my work.
    I first tried Apples Disc Utility.
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    Error: The underlying task reported failure on exit
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    I then purchased Discwarrior 4. Which said
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