Only replaced. I had a quick search for Belling spares online and it doesn't look hopeful. You could maybe email some of the bigger spares suppliers - and Bling themsvea of course - amdask their advice over tyeavailabilitu of parts and advice on how to fit.
Just a thought. If thedamage was accidental, would your home contents cover, cover the incident?
Djdjfb, April 2022