If you did a good job of your reinstall, you wiped the HD clean and everything's likely gone. The good folks at Carbon or BEam can probably figure that out at the counter just by questioning what you did.
If there's anything that can be recovered, the standard advice is: DO NOT USE the computer/HD for
anything until you have done all the recovery. In a 'quick and dirty reinstall' that just overwrote the existing stuff, what wasn't overwritten and destroyed is still there, just 'orphaned'—no recognizable ID—so your new OS can't 'see' it. Like Customs and Immigration can't see you when you don't have your passport. But everytime you turn on the box a little more of it disappears forever.
User-level file recovery software, like FileSalvage™ or Boomerang™ (about $100) hunts thru the drive for characteristic file features, gives likely possibilities generic names like Excel 0001 thru Excel 7863, and it's up to you to inspect and re-name the salvage. And
you need to run it from an external boot drive or disk. As a freebie, an outfit called
VirtualLab™lets you DL their client app., run it and pay only if the results seem promising.
Best of luck to you.