Found this on eBay. Looks like a normal rusty bumper jack to me but I'm clueless on why it's "CRAZY RARE" and works only for a '70 Charger:dontknow:? Oh and the price is too much.
http://www.ebay.com/itm/Mopar-Bumper...16.m2516.l5255
http://www.ebay.com/itm/Mopar-Bumper...16.m2516.l5255