Rockauto has them for $50-$60. Don't know how accurate they are, but it just comes down to what the resistance is. You'd have to look into it, but on the 68-70, Ohm range was from about 73ohms at empty to about 10 ohms at full to operate the gauges properly. I went in there and looked at it and the ohms range it gave on the Rockauto site was 80ohms at empty, 10 ohms at full, so as long as it actually reads that,... it should work fine.
