Missing pst files

Recently my office has installed Widows 7 on all office computers and have deleted all profiles from everyone. Before they have done this I did not check where my pst files where saved and now that outlook has been reinstalled I cannot find them, they are not available. I did a search on all drivers of the server and still cannot find the file, I also don?t even know the name of the pst files as I had not created them. Is there a way to find the old link to my pst files!
THANK YOU FOR YOUR HELP! It is much much much appreciated!
C.