Hmm, I don’t have anything official for the Defer script, but here is the script for the “Defer: Monday” script that you can edit for all the other defer scripts.

/*{
    "type": "action",
    "targets": ["omnifocus"],
    "author": "Serena",
    "identifier": "com.serena.of.monday",
    "version": "1.0",
    "description": "This plug-in will set the defer date to next Monday",
    "label": "Defer: Monday",
    "shortLabel": "Defer: Monday"
}*/

(() => {
    var action = new PlugIn.Action(function(selection, sender){

        var formatter = Formatter.Date.withStyle(Formatter.Date.Style.Short)
        var d = new Date();
        var deferMon = formatter.dateFromString("next Monday @ 9:30AM"); /* This sets the defer date to next Monday */
        var dueMon = formatter.dateFromString("next Monday"); /* This is the empty due date starting at 12am */

        selection.tasks.forEach(task => {
        task.deferDate = deferMon;
            if(task.dueDate !== null){
                var oldDue = task.dueDate;
                var newDue = new Date(dueMon.getFullYear(), dueMon.getMonth(), dueMon.getDate(), oldDue.getHours(), oldDue.getMinutes());
                task.dueDate = newDue;
            }
        })
    });

    action.validate = function(selection, sender){
        return (selection.tasks.length > 0 )
    };

    return action;
})();