Restoring accidentally deleted .mts and .wav files

I got that sinking feeling when, in preparation for doing a backup, I realized I had just put the wrong folder, of files not backed up, in the trash, and then emptied the trash! I used software called stellar phoenix to attempt to restore, and a bunch of .mts files were recovered, but they are broken into pieces only 21 mb in size or smaller. I converted some to .mov files with Toast, and then on an fcp x timeline I placed files that seemed to be consecutive based on the file name and the content, and discovered to my dismay that there were short missing gaps between the files! Also, .wav files of audio I had recorded separately were not recovered at all. Now I have a pro seeing what he can do. Has anyone had this problem before, and been able to recover complete .mts files, or at least pieces of files that could be put together with nothing missing?
I did not use all of the scanning options stellar phoenix offered; only the one for finding deleted files. And the files had resided on a separate drive, and I did not write any files after I did the accidental delete. So I have hopes that at least most of these files can be recovered. But if not, it will be a disaster; I'll have to tell several wedding clients that there is no video of their wedding.