Action to select the next sibling track/folder

[mahamatt]

Hi all,
I have a certain number of tracks, some of them are folders, some others are not. My intent is to easily switch between tracks on the same level using a shortcut linked to an action.
Now, supposing that I select a track, is there a way to select to the next SIBLING track (regardless if it's a folder or not) thus ignoring any children track?

Reaper has a native "Track: Select all top level tracks" action but I'd need to select only the NEXT top level track/folder, not all of them.
I have SWS installed but I have no idea about how to attain this.

Thanks