http://www.jegs.com/i/JEGS+Performan...30752/10002/-1
This is a 3" . $30. Summit's site isn't responding right now, but they carry them too. Should be able to use it and re-sell it for most/all of your money back when you change your exhaust.
...Granted, this is viable if you can have the welding done for free. Otherwise, you're looking at $70-$80 total, at which point, you could opt to just buy a used catback for not much more.