Hang in there, Hemirunner. I was looking too, and figured I'd be doing so for YEARS. I had actually resigned myself to never finding metal fenders and having to make do with fiberglass. Nothing for ages, then, all of a sudden, within the same week, I found a pair in my area, and paid a total of 400 bucks. They both need some work, but at least I now have a pair. Just keep your eye on Craigslist / Kijiji and the like, and put the word out with car guys - they almost always seem to know someone who has a friend who knows this guy who...etc., etc., etc...
Just for interest's sake, are you a member of the '70 Coronet Facebook group? That's where I got a line on one of the ones I got. Keep the faith!