Hi,
I can see no any other way at this point... Everything you have recently tried mentions a HDD failure... At the very least, the HDD is corrupted enough that it is being determined as not usable...
The only way to save any data would be to replace it and then try to recover your stuff afterwards...
You could try recovering the data by hooking it up to another computer, if available, and copying the files, but if Parted Magic can not access it, I don't think there is a good chance of being successful...
Let me know what you decide... I will help as much as I can...