I rebuild the hinges I have unless they are too far gone. The rebuild is really not that bad of a job. The worst part is cuting the pin, you have to be carefull when they are on the car not to cut anything you don't want to. With the hinges removed, I grind the head of pins off with my bench grinder. That top hinge is a pain to remove the inside nut, unless I have the dash stripped out of a car. There are lots of things in the way where you cant get to that nut.
I stock the pin kits if any one needs any, and I have a rebuilt passenger side ready to go. I have several other good driver and passenger side sets but the cars are not striped down enough yet to make the removal worth my while. Check back with me this summer I will be doing some serious dis mantleing when the weather breaks here.
Here is a pic of last rebuilt set I sold.
http://cmasalvage.com/91tc_redhinges1