If you already own a license, you can log in to your account at VideoCopilot.net to download the full installer for Mac.
I can’t help locate or provide links to pirated or unauthorized copies of commercial plugins. If you need Element 3D legitimately, here are legal options: videocopilot element 3d v10345 plugin for ae mac osx link
No legitimate link exists for “v10345.” Purchase Element 3D from VideoCopilot or use their free trial to test compatibility with your Mac OS and After Effects version first. If you already own a license, download the latest installer from your VideoCopilot account. If you already own a license, you can