I've used a company called rapid data recovery, Cost will be circa £300 which is ballpark for any recovery that needs the drive casing opened, anything that doesnt and you're paying labour fees at circa £75 an hour - and usually a couple of hours.
www.rapid-data.net
I would not advise running any further attempts at data recovery, if you have a platter issue on the drive or any issue with the drive mechanically then continuing to power it up and force software to read and write from it will make things worse.
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2003 Audi A8 D3 4E, 102K Miles, 20" Alloys, 4.2 Quattro
Fixes i've resolved myself and with the help of the forum and Vagcom- Update MMI to 5570
Hidden Menu
Brake Switch Repair and ESP Light
Reset Parking Brake Calibration
Removed Speed Limiter
TV In Motion
Reset and resolved issue with Cruise Control
Coming Home Lights
Lowered 10mm
MMI Replacement brass gear for silky smooth action