whisker pole
At the size needed for a DS, a whisker pole will do. The proper length (overall) is max 74" according to the class rules. You can put one together yourself if you have the availability of 1" alumunum pipe. The individual ends, or the whole pole are available at Holland Marine Products in Toronto. They are mail order or walk in. Here is the link:http://www.hollandmarine.com/hmp/Catalog/CATALOGU1.pdfCheck page 385 for the parts or a few pages back for the whole pole.