MF1455 muffler replacement

[joh]

year 2003, engine model #54DD, part #4264400M91 is no longer available! It's a under the hood, vertically exhausted, 4 cylinder, 2.8 L, 55 hp Iseki made tractor for Massey Ferguson. No aftermarket supplier. No response as of yet from my email to Iseki in Japan. A MF dealer suggested I try to make a 1445 muffler ( that's still available) work. Does anyone else have a suggestion as to how to solve my problem. I might go to a Kubota Dealership to see if they use a similar muffler (with slight modifications), like the M6040 or the M5140. I'm going to try and take some pictures and measurements of my muffler set-up tomorrow.