After a year, it is quite doubtful that you'll be able to retrieve any useable data from any of these files.
And the issue is not that you've re-arranged the drive, it's that the probablitity that a cache file, or another transistory file hasn't override a block that use to be attached to one of those files is minute. Once the block is overwritten, even by 1 byte of data, it's virtually impossible to recover that file...
But, certainly give it a try...
FileSalvage is a undelete / data recovery tool, http://subrosasoft.com/OSXSoftware/index.php?main_page=product_info&products_id=1
That offers a trial mode - No Registration Number - Trial Mode
Without a registration number it is only possible to start using a version
of FileSalvage with limited functionality. In Trial Mode the user
will be able to scan for files but will be unable to recover them. For
full recovery functionality, the user must register his or her version of
FileSalvage. To do this, purchase the software online or via a retail
channel, and then simply select "Register" from the FileSalvage drop
menu and enter a valid registration number in the dialog screen.
And there's a number of other data recovery tools that are available for low cost...