Try a Google search for a, " 24v waterproof switch". You'll get thousands of them. I just did.
Avoid Google at your peril !
Think of Google as your own personal Aladdin's Magic Lamp. Rub it three times and the Genie will appear and grant your wish. Works every time.
What? You've never heard of Aladdin's Magic Lamp? Too bad. I guess you probably never heard of Jack and the BeanStalk or The Wizard of Oz either. Maybe should try childhood all over again.