Invacare Pronto M51 Power Wheelchair "m50" Questions

I have a Pronto M50 chair but need a battery charger for it. What charger do I need to buy for it? get a 5amp 24 charger with an XLR plug.

Rebuilt motor installed in Pronto m50 power chair, now joystick forward, takes chair to right, joystick right takes chair forward, joystick to left, taks chair back, joystick back takes chair left, ...

speed control knob has come off My dad has an Invacare Pronto M50, M51. It is in good condition except the speed control knob came off. Where can I find a replacement part? you need Invacare part # ...