the commodity is traded the same way currencies are, no regulated market, true "over-the-counter"
most of the stocks are traded in Canada, here are a few...
URE.TO
U.TO (sort of like an ETF)
AXU.TO
MGA.V
LAM.TO
UUU.V
PDN.TO
CCJ (US side, biggest player)
TXM.V
SXR.TO
That should...