Both shops (the one that would tig a new weight on, and the one I went to that rivited it on) said it would be $50-55 bux. I was charged $50. THats a whole lot cheaper than an new one, especially since the prices went up.
I have the exact same problem since my 3.73s gear install, I posted a thread about it a while ago and most people told me the exact same thing.... Replace it with allu d\s since it's too expensive to get it calibrated... What is the price range for a normal alu d\s for a stockish car ?