Amazon.com has Hori Nintendo Switch Split Pad Pro (Volcanic Red) on sale for $38l.20. Shipping is free.
This is cheaper than the now dead $40.50 deal on the Midnight Blue color that was on the front page.
About this Product:
Full-size Controller experience in handheld mode
Larger grip, Buttons, triggers, analog sticks, and d-pad
Assignable rear triggers, Turbo functionally, and more
Officially Licensed by Nintendo