Can we access the thumbnail of a unity package from a custom editor script ?

I've got a Project Wizard script that allows me to create a new project and import automatically selected packages, and I want to show thumbnails for packages so it's easier to identify them quickly. In the wizard, I've listed standard packages from the local unity installation and the ones from the asset store, but I don't see any way to access the thumbnails as they are displayed in the asset store easily.

edit : I got a wizard that list projects, and now I'm able to get icons from the asset store links, but that's a very ugly way to do this. See picture attached.