It must be drive busting season since I'm not the only one whose drive conked.
Encrypting your drive is a solution meant for enterprises, concerned with theft where it could cost them millions for industrial espionage.
To understand the difficulty of recovering the data, it is the equivalent of asking a fat, wobbly guy like myself to walk a tightrope while badly drunk and heavily sedated.
You need professional help, it will cost in excess of multiples of what a new drive is worth and even then, the extraction process may fail or may be futile if the pro isn't able to recover the ENTIRE decription sequencer.
At least it will be a lesson for you in the future.