1988 TRX300 4×4/tractor muffler

Hi everyone ,
I need a new muffler on my 88 as a result of rust. The main pipe looks fine but the muffler is full of holes. I have read a few threads where people mention using a tractor muffler. Is that a viable option? If so, where would you cut the pipe from the muffler? What Specific adaptor would I use to join the pipe and muffler?
Do need to fabricate mounting brackets to hold muffler to frame?

Thanks,
Zack