They really are not that hard to restore.
First step is to remove the contacts from the old set. They are spring loaded and easy to knock out after the brittle backing area is broke on the backside of the socket (plastic). The bulb socket will remain (this is press fit) and you just want to remove the contacts so that just the socket remains.
Next go to the parts store and look for a simular sized socket with new "floating" contacts. Floating means that the contacts are mounted on a piece of circut board that sits inside the socket and the contacts are not actually mounted to the socket itself. You'll need two of these and sometimes you might even be able to just find the floating contacts themselves.
Run your new contact wires through the front of the old socket (there should be two wire holes) and firmly push the contacts and circut board into place inside the old socket (sometimes it'll actually click into place).
Splice your old parking light connector to new socket wires and you're done.
I'd eventually like to get some pictures of this process online, so if you think about it and want to document it for us, It'd be much appreciated.
Chris