Suggestion: Targaryen Islands (Aegon, Rhaenys, Visenya)

I recently discovered the Targaryen Islands, beyond the Arbor in the Summer Sea. I thought it would be really cool to have submod adding them in, even if they're just small additions with no de jure kingdom and only its own duchy.

I don't have any skills in modding, lest of all map modding. I wonder if there's anyone else out there with modding expertise who shares the same interest as I do for this.