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.