Need to make my phone stock through CWM?

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http://forum.xda-developers.com – Hi everyone, Recently my Ace has stopped charging through the USB port. I tried every cable I could find, even the PC cable, but none charge (and the PC doesn't recognize the phone), so I've come to the conclusion that my phone's port is faulty. I'm still under warranty, so normally I would just send it in. Here's the tricky part. I have cyanogen mod 7.2 flashed on the phone, and I'd rather send it in stock. Before anyone asks, I DID make a backup of stock the moment I got the phone, but in the 6 months I had it, somethings happened and now it won't go back to it (it recovers up to 'data (HowTos)