Yeah, I thought a "batwing" was what I had on my caddy, turns out I was wrong. Thread: http://www.jalopyjournal.com/forum/showthread.php?t=184963
Our very own VAPHEAD had them for sale on here a while ago... http://www.jalopyjournal.com/forum/showthread.php?t=162208 Mootz
the Technostalgia/cool-leds one is a very good item, I bought a couple and was surprized just how accurate they are.
Why buy a repop? They are all over ebay, swap meets, etc. You can find them on all kinds of cheap cars on craigslist. (I have seen a few $600 beaters/projects for sale on there, bet the seller would love to get $100 just for the air cleaner!)
Summit sells a chrome one for $120, but you can see five or six dimples on the top from spotwelds. Looks ok otherwise.