While I agree with the majority of advice that your chances are near zero:
And worse it is a little over 18months since I had to do this type of recovery and I am looking for links to the tools I used start the recovery process.

The fact that the PC can see the device is a point of hope.
The Issue you have is the data area of the Drive that the PC's OS reads to determine what the drive is is corrupted. The area of concern is the same that U3 use to tell the PC that part of the drive is a CD
When this happens on a HDD - We would partition and format the drive.. it is not so simple with the Flash media. You can try the Windows "Drive Management" in "Administrative Tools" and see how you fare there.
Some of the drive manufacturers had free downloadable "Formatting" tools, these were my first line of attack. CHeck on the brand of your drive in case they have such a tool and see how you get on.

Once the PC is able to recognise the media correctly again THEN you can have a go at the file recovery. Many of the tools listed have a very good chance, if there is anything left to recover.