1200 RT(non GS) 2610 mounting

[paddy]

I am only posting this here as I know a lot of people jump between the two Variants. (GS-RT)

I have just got a Ram mount and 11 mm mirror base to mount onto the handlebars of my RT. Does anbody know where I can source a longer bolt to go through the 11mil mount and still safely hold the bar in place.
Thanks

Paddy