Absolute worst case scenario if you are unable to get a replacement, you can get a pane of glass and either score and cut it yourself (diamond or silicon carbine and a ruler to score, and then either a drop of water on the score lines and snap or put a bit of string soaked in lighter fluid and set it on fire on the score line, once it’s heated dip it in cold water or pour cold water on and it should split along the score).
Use youtube to actually see how it’s done.
Or go to a window maker (or if your hardware stores do it) and ask if they can just cut a pane to size for you.
Absolute worst case scenario if you are unable to get a replacement, you can get a pane of glass and either score and cut it yourself (diamond or silicon carbine and a ruler to score, and then either a drop of water on the score lines and snap or put a bit of string soaked in lighter fluid and set it on fire on the score line, once it’s heated dip it in cold water or pour cold water on and it should split along the score).
Use youtube to actually see how it’s done.
Or go to a window maker (or if your hardware stores do it) and ask if they can just cut a pane to size for you.