You’re pretty much on your own these days for the 1000s. There are some companies reproducing the Hindle 86-87 VFR700/750 performance exhausts.
https://www.ripplerockracers.com/
I have a Hindle on one of my 1000R and a Hindle for a 83-85 VF750F. These were actually the same as the Dale Walker Holeshot and the Sudco.
I own 4 1000s (3 R and 1 F), 2 VFR700F, 2 VFR750F and a few 500s.
Sorry for the thread jack. Perhaps you should start a new topic…