I've only just found the phone and yes should have made a backup but this was 21 Aug 2011! This was so early, as I said in the OP there wasn't even any unlock security on the BTC app. There wasn't much value to protect...

I didn't even know there was 0.7btc in the wallet still.

My main question is about searching the phone, all the "recovery" software i have been looking at is looking for and sorting out certain file types, like .jpg, .mov etc as you'd probably want from a wiped phone.

I'm looking for a file that doesn't even have a file type!