Oh crap. I didn't know that. Where do I get the o-rings? Now that I look at my plumbing I see I've got some other flare fittings including on my fuel lines. Haven't had any leaks yet..
Earl's makes a copper crush gasket, a refrigeration supply house will have some too. It's not the best fix, but may save you some grief.
Standard flare is typically 45°, whereas AN is 37°.
GT