There is a lot of mis-information going around about glass repairs to these types of windows today, You can repair almost any without making new ones - new panels are never going to be the sane as the old glass so all im saying is dont just take the advice of first person you ring from an internet search - find a specialist who can actually do the repair - save your old windows and save the environment at the same time.
All the best and stay safe - well done the NHS
Michael
Near Fortismere School