Thanks for that - an awesome list that puts everything into perspective - pretty much covers a bit of research that I have been doing over the last few weeks but yours is even more comprehensive than my efforts!
I was wondering why your list didn't include MMG though? I initially forgot about MMG but someone mentioned that they do have a secondary listing on the ASX that has sort of gone under the radar a bit. I know its a bit of a PITA to do the Chess Depository Instruments (CDIs) thing but if you can own shares in MMG then you have exposure to 3 producing mines in Australia (Roseberry, Golden Grove and Dugald River) plus Sepon in Laos, Izok Corridoor in Canada and Las Bambas in Bolivia so that would be quite a lot of exposure to Zinc and Lead prices (plus some Copper) there as thats at least 6 sources of production from 4 different countries.