I've got a brand new Autometer Lunar Mechanical Water Temp Guage sitting in the garage. I paid $125 for it from a company that used to sell on ebay... will take $105 and can meet up in the Western Suburbs...
Model #4131:
http://www.autometer.com/cat_gaugedetail.aspx?gid=2593&sid=5
Model #4131:
http://www.autometer.com/cat_gaugedetail.aspx?gid=2593&sid=5