Hello First time Poster,
For the People in Australia, have you found something similar available locally that you have been able to make work?
This is the US Link to these
https://www.homedepot.com/p/Home-Accents-Holiday-13-in-LED-Jumbo-Bulb-with-Timer-White-8211-13689/305025779
At work (large cranes on a wharf) we put dielectric Grease on all connectors outside. We are right next to the Ocean and it prevents rust / corrosion on our connectors.