Found this on local CL. Don't know what it's worth but I know there hard to find. Thought I would post it in case someone is looking for one.

http://detroit.craigslist.org/wyn/pts/1493017376.html

A good reproduction is $180

This is a 325 HP 5000 redline tach. The original L78, 6000 red line goes for that kind of money.

kneeknocker for 500 bucks-guess he will keep it,unless some barret jackson minded sap needs one for the 66 chevelle hes paying someone to much money to restore..

rth