I just listed an Airguide speedo that I removed from a 1997 Nautique. It is in perfect working order. It was removed to insert a PP display.
http://cgi.ebay.com/ws/eBayISAPI.dll...MESE%3AIT&rd=1
http://cgi.ebay.com/ws/eBayISAPI.dll...MESE%3AIT&rd=1