Glass only replacements are done by people that have experience in doing LCD refurbishing it's really not doable for the average DIY person.
It requires tools like freeze machine, enclave, OCA frame to get a good finish.
If you were to do it yourself, there is a high chance of damaging the LCD and/or not having a good finish on the screen.
The tools required can cost well over $1,000 to get it done properly and takes a lot of patience to remove the glass without damaging the LCD.
You are better off replacing the whole screen assembly together as one piece.