Build this source how-to:
1) Get cyanogenmod sources:
repo init -u git://github.com/CyanogenMod/android.git -b gingerbread
repo sync
2) Copy sources to *source_home*/device/zte/v9plus
3) Initialize build environment:
source build/envsetup.sh
lunch full_v9plus-eng
4) Build sources:
source build/tools/device/makerecoveries.sh full_v9plus-eng
5) Get your recovery.img from *source_home*/out/target/product/v9plus/
Full guide (Porting Clockwork Recovery to New Devices): http://www.koushikdutta.com/2010/10/porting-clockwork-recovery-to-new.html