You can always make some if you can not find some made already.Take some perferated steel, roll into a funnel shape, weld were the two ends meet and insert into the tail pipe. Hold it in place with a sheet metal screw or a bolt and nut. Or you can do the washer welded to a bolt or lolli-pop type restriction. Put a small hole in the tail pipe insert the lolly-pop into the hole and lock it into place with two nuts. You can turn the lolly-pop restrictor from wide open to flat across the pipe to adjust the noise. Now if that is still too loud you can put a bolt in the center hole of the washer. The washer will not make it perfectly quiet, but it can tone it down a bit and it can be done for cheap. ...Also ear plugs help.
Buckeye, Arizona(USA) 2011 Victory Cross Roads, Black police bag guards, black engine guards, black handle bars, Triumph Tiger mirrors, Triumph hand grips, set speedo/tach back 5" , adjustable timing wheel, Lloyzz Fuel Programmer III & air filter. Modified exhaust, made stock into 2 into 1. MRA windshield, Rotated front fender forward,relocated ignition switch, Bad Ace Fuel Tank Risers, Fat front tire.