Vipers map is just three tents and a caravan cart.
Already suggested some time ago, basically "add more content" suggestion.
A map, but would be the purpose of it? Each public location is a bit more than just "a map", inb4 "hurr durr all locations are empty wtf?!?!" threads.
I'll ask Corosive if he has some plans with Abbey or something like that.
Btw it's better to make a new location from the scratch than try reimplement cut content from a single player game like F1/F2.