If the data on the drive is really critical there are a number of ways to recover it. The easiest way would be to buy another drive or the same manufacturer and model. Then replace the component on the bad drive's logic board you know is missing from the new one. The harder approach would be to move the memory chip from the bad drive to the new one.
This might be a repair you would consider getting professional help for. Depending on the data the drive contains it may not be financially feasible to retrieve the data on the drive.