Honestly man, the Takeda axle back is like $450.
You could pick up a Vibrant 2.25" inlet/outlet muffler for like $150 and have flanges and tangs welded up for far cheaper than that. I'd bet most exhaust places would charge $100 or so to do the job. I had a flange changed over for $75-ish.
Its not a "bolt-on" route but it way cheaper and works better. I suspect hardly anyone bought the Takeda muffler for that price let alone would be selling one for less than you can have a Vibrant one fabbed up.