Factory pattern, Avoid same switch case for different interface

I have a Model which Implements 3 different interfaces

public class CustomerRateSettingModel :  IBaseFactory, IHandleSearch, IHandleSearchAggregate

I am very new with implementing design patterns and trying to implement Factory pattern to create instances. But I am unable to find a proper way to avoid the identical Switch statements while writing Factory

  public static IHandleSearch GetClassInstanceForSearch(string className)
    {
        switch (className.ToLower())
        {
            case "customerratesettingmodel":
                return new CustomerRateSettingModel();

            default: return null;
        }
    }

    private static IBaseFactory ManufactureModel(string className)
    {
        switch (className.ToLower())
        {
            case "customerratesettingmodel":
                return new CustomerRateSettingModel();

            default: return null;
        }
    }

Is there is any right way to handle scenarios like that?