3GP Incomplete File -> Recovery

Hi all.
I have recorded a 3gp movie with a Sony-Ericsson mobile phone, and before stopping the recording (when the phone should save the end of the 3gp file, which contains all the frame rate and all movie informations) the battery went off, I recovered the partial file from the memory card but it is unusable, I tried everything available on the internet.
The movie has intact headers, but it lacks the end of file with all the video infos needed to be played.
Can anyone help reconstruct the video?
I can even pay for the solution, this movie is extremely important to me.
Thanks for reading,
Horia.