Alarm for High Temp

[TIARA PHIL]

Have 1992 Tiara Sport Cruiser with Twin Merc 5.7 High temp waring only has small idiot light which you can't see in the sunlight want to add some kind of audible alarm that would sound when temp gets high has anyone done this before and if so where and what parts might I need.

Thanks for all your help in advance.

PS there are no audible alarms for anything on it now.