Can I obtain a 'starter' for an electric cylinder qualcast concorde 30?

Where can I obtain an important part for my electric qualcast concorde 30 cylinder mower manufactured in 1999?

Can I acquire the rear portion of the green 'safety switch' ?

This will include a red 'starter button' and a black 'dead man's handle' (which has broken off). Online companies say they do not stock this important item.

230 volts, 50Hz, 280 watts. 961 007 944, LWA 96, BS 3456, IPX 4 - 579,

The rear of the box is held on by 5 phillips screws. The colour of the machine and box is green. Can you assist? Thank you.