InDesign script to batch export png, jpg or pdf

Hi All, 

Where or who can I buy a script from that does batch Package of InDesign files and creates a PDF & JPEG or whatever other format I need?
Thanks
Dean

I mean, if you just want to export all open documents as pdfs with no extra fuss, this would work. The time it takes would be dependent on the complexity of the file to export, just as if it were done manually. This assumes your ID has the PDF/x1a preset loaded. 

var outputToPdf = function(doc, folder) {
    var exportFile = new File(folder.fsName + "/" + doc.name.slice(0,doc.name.lastIndexOf(".")) + ".pdf");
    var px1aPreset = app.pdfExportPresets.itemByName("[PDF/X-1a:2001]");
    try {
        doc.exportFile(ExportFormat.PDF_TYPE, exportFile, false, px1aPreset);
    } catch(e) {
        alert("Couldn't export " + exportFile.name + " for this reason: " + e);
    }
};

var folder = Folder.selectDialog("Please select a folder to save to");
var docs = app.documents;
for (var i = 0; i < docs.length; i++) {
    outputToPdf(docs[i], folder);
}