Petrol lawn mower. for repair (Longbarn WA2)

Qualcast petrol lawn mower with Briggs & Stratton 3.5 Hp Quantum engine.
The rear roller has broken away from the deck, the deck is damaged as shown in the photos. It's presently not usable in the current state.
It may be repairable by someone who can engineer a support bracket or useful as spares to keep an old mower going. This mower is around 30 - 35 years old now so unlikely that a replacement deck is available.
Engine runs fine with fresh fuel but does take a bit of persuading to start - possible that the carb is gummed up from storage?