Revamping either map sounds really exciting, and I'm in total approval.
I suspect the copyright will be okay (though I'll check with Ian), so long as we don't repurpose the map.
Neither of the map-makers are active on the site any more (Jota
and Banana Stomper
), otherwise you should contact them regarding the revamp. I think paying some homage to their original efforts would be nice, but we may continue without their input from here.
First step is to post an image of your efforts so feedback can be provided.