Need to Flash back to stock! Help Me!

[HeatRyder]

I have a HTC Desire Z from bell. I want to flash back to stock. Basically have my phone as it was out of the box. Any links, or help would be very helpful. The thing is that I dont have the stock rom before I rooted my phone and all. BTW the reason I want to do this is because I want to update, and ClockWork Mod wont let me. So I figure might as well flash to stock. Thank you for any help.

 

[SeeK]

Hence why you should always, always do a full backup before you touch your stock ROM.

Quick googling yielded this. Might be something?