Hi, did you not ask the guy to save what data he could when doing the repair - is so, he might have put them all in one new folder, perhaps called 'Old' on you repaired setup. I know this is what my repair guy did with mine some time ago, so I did not lose any files.
If you didn't, I am afraid they are probably lost for ever and ever!
You could of course try to find them with something like Media Recover - I think it is a free download.
Cheers and Good Luck