Yeah, they have you over a barrel if you go to the professionals to get it back. If you merely deleted that, it's probably still there but you'd have to cease disk activity entirely on it until you recover. But the pros here typically charge no less than $1500 for crap like that. And if you tell them it isn't business critical (because that's who they get to pay that amount), they can do it for you for "just" $1200 and you wait 3 months to have it done.
I speak from experience when I lost a 120Gb music collection on a NAS disk that went bad. I buy disks in pairs ever since.