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These are over $300 but these are aftermarket Tesla buttons that can control the wipers and other functions:

(not an owner, just have a good memory)

Just keep 4 spare CR2032 batteries handy in case it starts raining and your wiper button batteries are dead.

oh wow. amazing.

keep going! now a knob for volume control with push on/off, and a separate one for temperature with push on/off.