Not sure it's available to purchase. I've searched on the web, called Telus, and called my friend in Canada as well, to no avail.
Did you contact the Canadian guy who was offering to switch his Telus back with a Sprint back? I understand your back is not looking well, but perhaps he can find out where to back a replacement? See this forum:
http://forum.ppcgeeks.com/showthread...s+diamond+back Last and second to last posts by Chakde.
Good luck and let us know if you find out how to get one.