What's the deal these days and there only being metal 50 cal cans on the market. Cabela's strictly a green 50 cal can. Canadian Tire black 50 cal cans. The only 30 cal cans I'm finding are plastic cans, other than amazon but let's be real $40-$75 for a can on amazon is outrageous. Am I missing something or are the 30 cal metal cans just a thing of the past.