You'll find CWM flashable 1.4.1
here. Yes, of course you will lose your data; you're replacing CM7 entirely with stock. You should format system, cache and data under "Mounts and Storage" in CWM before flashing the zip, and make sure you have the current build of CWM, 3.2.0.1.
Here is a 1GB image of CWM 3.2.0.1 if you need it:
http://tinyw.in/0Vw