hello rusticratbag
One of the best people to contact with your problem, for advice and spares is- Jon Cruse, The Mower Centre, Vicarage Road, Hailsham, East Sussex. 01323 842477. I am sur he will be able to help you, and he has a postal service for parts, and a website.
Not an evening person, as he operates during normal working hours including Saturday mornings.
Chris.
I used to deal with him when we lived in Ringmer, East Sussex.