Oh happy happy joy joy...
New drive arrived, swapped out the logic boards and she's up and running.
370GB of data back for a very reasonable £48
Didn't realise - turns out there was 3503 pics, 7507 MP3's, & 3174 AVI's.
Lesson learned..
Must recommend
http://www.ultratecdirect.com and the shipping/tracking system they use (Interlink Express). I've been able to watch this process online from them receiving the customer data to label printing right through to doorstep. Top notch.