Good show Winnie for making many 12 volt feeds protected by circuit breaker and NOT fuses
This was a notable feature noted by me when coach shopping.
For those chassis electrical feeds that are protected by blade fuses, drop into a good auto parts store and buy an assortment. Bear in mind there are miniature blade fuses and standard fuses. Like Dave suggests, it would be helpful to at least have a general idea of what kind of fuses you have (miniature or standard) and a range of amperages used in your coach.