As far as I know, 6101 and 6102 are the same phone for different carriers. The 6101 faceplate will fit the 6102 w/o problems. Ebay has several available for next to nothing.
Replacement instructions:
Turn the phone off.
Open the clamshell.
GENTLY peel back the gray frame edge at the bottom of the LCD screen to access the screws. This is held on with sticky tape so be careful not to bend it up so you can press it back into place after you change the faceplate.. (try an Exacto knife or razor blade)
Remove the screws.
Gently remove the top cover and put the new cover in place, replace the screws and then press the sticky part back on the phone until it is smooth and even.
Done!