eBay has one just sold for about $500 US but it is almost new. https://www.ebay.ca/itm/165476032009?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=3hbVjWQhTVW&sssrc=2349624&ssuid=DwwxWpP2QX-&var=&widget_ver=artemis&media=COPY
Actually, the exhaust coupler is supposed to be 90 degree coupler. To free up the carb, you can add some after run oil and let it soak for a couple of days, then you can put in a small screwdriver like those you use for glasses or small plastic stick or even tooth picks near the edge of the...