Here are the WBC ratings before the Harris vs Witter fight.

Chammpion:Junir Witter
1 .- Vivian Harris (US)
2 .- Timothy Bradley (US)
3 .- Herman Ngoudjo (Canada)
4 .- Marcos Maidana (Argentina)
5 .- Jose Luis Castillo (Mexico)
6 .- Juan Lazcano (US)
7 .- Jungbum Kim (Korea) OPBF
8 .- Demetrius Hopkins (US)
9 .- Norio Kimura (Japan)
10 .- Ajose Olusegun (Nigeria) ABU/COMM
11 .- Lovemore N'Dou (South Africa)
12 .- Francisco Figueroa (US) NABF
13 .- Gianluca Branco (Italy)
14 .- Cesar Cuenca (Argentina)
15 .- Samuel Malinga (South Africa)


Juan Urango is ranked 19th so I suppose there isn't much chance of a voluntary defence against him.
I suspect that Frank Warren will keep Gavin Rees away from Junior Witter.
If it was a fight with Torres I suppose it would have to be in America to make it happen can't see either travelling to the others backyard.