WOW!
How the ‘ell did I miss this?!
I’ll see what I can do here. A thought, though. Not everyone is willing to allow/invite Google scripts of any kind onto their machines (and I don’t blame them at all for that. The more you know about Google, the less appealing they get.) Ergo, let me tinker a bit with OpenStreetMaps, too. I doubt it will come up to the level of function you’re looking for, but it’s worth a lookey-loo.
Contact Jerry. (WA5KZY) Early on he was working on a locator map of all the hams in the area. I don’t know the status of that, nor if he would want it made public, but again, it’s worth chasing the rabbit.
Dan