The Righthand Footrest hanger on the Griso 1200 SE 2016 (to which the rear brake pedal is also mounted) is no longer produced by MG. I cannot find a new part anywhere. Does anyone know whether this part was also used on a different model MG that could be used ?
I assume you are referring to part number 1 in this diagram from the parts book (available here https://www.guzzitek.org/gb/pl_us_uk/1200/Griso1200_8V_SE_2015_092014_PL(GB).pdf page 13 / 76 )
That comes up as part number 977052 If you google search for Guzzi 977052 it will show you that Stein Dinse have 5 left side in stock, but no right hand ones.
It is out of stock in Fowlers, but it does show it is common across the Griso range, but no other models.