Lents problem

Hello.

I usually repair laptops and PDA's or things like that. However I did attemt to fix a broken camera, it was dropped down and the lents mechanism was damaged. I first managed to repair it by dissasembling half of the structure but after some time some probems reapeared. I dissasembled all the lents mechanism now but the main problem is that I can't put it back :). I have all the components, done that with care, but those small mechanical stuff are pretty hard to put back. Is there a way to assemble it back or does a service center could make that? I want to know this before I send the camera back to Sony service. Or they will try to make me buy another camera, or lents mechanism?