I did a really quick search beware there is 3 different models of the diamond the verizon one is different. then there is a gsm version (at&t, t-mobile, rogers etc) and then the one sprint,telus,bell uses. and this e-bay listing the pics of the screen say t-mobile so try to find it somewhere else maybe. I have mixed feelings about e-bay myself but at least now I will remember its called a digitizer. ((edit first link before editingshowed for a diff diamond model than you likely have with telus.
http://cgi.ebay.com/OEM-HTC-Diamond-...item5882923e4b
OEM HTC Diamond Sprint VX6950 CDMA LCD Touch Digitizer