digital gauge to analog conversion

i have a 1999 saltwater series 150 hp with multifunction tach and speedo gauges which do not work anymore and i dont feel like spending $500 to replace them which i have done before only to last another year or so.
i would love to convert to analog gauges
my question is the tach, speedo, trim, and fuel i would think is fairly straight forward but on the multi gauge there is also the buzzer which alarms you of oil or heating problems, also the oil level gauge
i dont care about the trip function or clock
has anyone done this conversion? any tips? or am i just dreaming and should accept the fact that i need to replace the digital?
thanks for your help, any and all comments are welcome

[boats.net]

You can use the analog tach with with oil lights, 6Y5-83540-05-00 which will give you the oil warning but not overheat. The warning buzzer should sound with or without gauge just wont know if it's overheat or low oil warning without an indicator.Use the trim gauge for 3 wire trim sender 6Y5-83670-11-00.