EBay of course, This is the best price I have seen so far.
OEM HTC Evo 4G Touch Screen Glass digitizer Repair New - eBay (item 230511023378 end time Sep-11-10 16:46:24 PDT)
OEM HTC Evo 4G Touch Screen Glass digitizer Repair New - eBay (item 230511023378 end time Sep-11-10 16:46:24 PDT)