Where in the country are you? My guy who built it can do the same for you...he worked on the 'Britten' bike from getgo and also Strouds race bikes...he knows his stuff...Its hard to show you photo's as its basically a box with internal pipes...the external 'Mufflers' are retained but there is only one pipe if you look up the exhaust instead of the small one inside a bigger one.
https://youtube.com/shorts/-2qH4XkM
the video came out back the front...dont know why.