Close to me is a person that rebuilds and custom makes his hinge parts. I had been in contact with him about rebuilding my hinges. He claims his parts are a lot better then the repro one out there. I'm thinking about letting him do mine.
He sells a GM firebird 29 coil spring count for 35.00.
Here is the information he sent me on hinges
"We can rebuild all 4 of your door hinges for 135.00, plus shipping charges. That gets them back to you in bare metal or in primer, with all new hardened GM door hinge pins, our own custom made oil-lite bronze bushings and 2 custom made detent rollers, which are hardened and have an oil-lite bronze sleeve for ease of motion. We can rebuild your hood hinges for 150.00, plus shipping, which gets them back to you with 14 new rivets, and in bare metal or primer, lubed with white lithium grease in between all metal to metal movement areas and under the rivets, when pressed into place. We also sell the new GM Firebird hood springs for 35.00 a set. They are 29 coil count hood springs, just like your original springs and help the rebuilt hinges work in uni-some. We have a few coating options as well if interested, we do a Zinc Phosphate spray finish, which cost 20.00 additional dollars for the hinges and springs. Zinc Phosphate is the closest we can do to original GM Phosphate. We also have a cast blast if you prefer a lighter shade of grey for the same price. Satin , semi-gloss and gloss blacks are also 20.00 for the spray finish. Powder coating is our most durable coating which runs 75.00 for the hinges and springs."