There are some generic Chinese switches on Ebay for super cheap that ought to work , here are a couple different styles and combos :
https://www.ebay.com/itm/7-8-Left-Ha...oAAOSwk~xcx7y1
also there is
https://www.ebay.com/itm/22MM-7-8-Mo...AAAOSwqyJdXef3
I'm sure you can find exactly the combo you need if you poke around some, just search 7/8" motorcycle switch left ( or right) side , etc.