It looks as if it is a 1920-30's door with beads run off the stiles, etc, so not easy to replace a panel. Panels fiitted at time of asssembly. Solution may be to scrape panel, establish the extent of damage, and then advice may be easier. Alternatively as suggested buy a new door. You should be able to find a door to fit. Probably be imperial sizes and not metric so check carefully, give or take an 1/8 inch or so (a few mm). Plenty of info here on fitting a replacement door. Best wishes.