Depending on the quoted price for restoration... would think you could find decent used replacement hinges from an auto dismantler, eBay, swap meet, etc.
Granted, hood hinges do wear like everything else, but not as much as many other automotive parts.
I see a pair on eBay right now for $85, albeit that they should be stripped and repainted. Depending on condition, unless they are in as bad a shape as your current ones. Also, not sure but there may be good parts interchange with other Mopar vehicles (like trucks, Satellites, etc.)
http://www.ebay.com/itm/1971-74-B-Body-R...b09&vxp=mtrSeems to me that the '71/'72 hinges are not the same as the '73 / '74 style.
Description: Hood Hinges