For anyone finding this thread and looking for a db-killer for their 797 Termignoni, this
might be an option
https://www.motorcycle-exhausts.co.u...ct--17450.html
It's from the Termi can for the MV F3 675 and appears to be the same shape as the Evo's and 797's. No sizes are given so further investigation would be needed but it would make economic sense for Termi to us the same baffle in more than system.