Hello! I was wondering if both of these still existed, and where I could find them if so?

There is only one version of the Zapper now, and you can find it in Darkside. It's the building on the bottom left of that map. Here's a direct link: click

The Gardens still exist as well, you can find them on the Veta map by clicking on the red farm building on the hillside. Link here: click

thank you very much!