You could pour through the different filings on pinksheets.com. I'm not sure if this is what you are looking for but you really have to dig through it to come up with all the details about the company that would be important. It is sort of scattered throughout. Lots of details to take in.
I haven't found any, but if you do the grams/ton eval, maybe someone could come up with some $$. I guess it depends on how many tons of material they get from each location.