Thanks for the reply. I did see that one on ebay, but I mine is the newer style (ASN JAF0245225) that came with these machines. I don't know if that one can be modified, Id hate to take the chance for a 300 dollar muffler. I would rather buy the correct one the first time.
Here is the Part number for the one I need.
My SN is JAF0245844 which Messicks calls out for
330941A1 and 299455A3
https://www.messicks.com/cas/144795
I don't know what the exact difference is, but the only cross reference I could find were this part numbers
3428-MX-1R05-22, and 3440-MD-1R05-22