Post Maps in Sidebar Plugin Request

[ Moderator note: moved to How-to and Troubleshooting. ]

I’m looking for a Google maps plugin for travelers that doesn’t appear to exist, but if it does would someone please point me to it? And if it doesn’t, is there a possibility of it being developed? I’ve seen similar requests when googling for it.

In the Post editing screen, I’d like to see a plugin feature that would reside in the sidebar where I could add a custom map specific to that one post that would insert a map of that location of that post into my post’s sidebar. For example, if I’m writing a post about a location that I want to recommend that I could show that map in my sidebar. It would be easy to do if there was a plugin similar to the “Featured Image” selector, but in this case I could choose a Featured Map!

Currently, I can only enter a map somewhere in the body of the text; or I can only post a map in the sidebar but it effects many or all posts. There seems to be no method for creating post maps (like a unit of Media or other plugin list) for the sidebar.

Thanks for any feedback.