I am reposting this Add that I added a while ago
I have a couple of used "gantrys" off the ST1100 Police bikes,
These are the brackets that mounted across the rear cowling and had the police for the blue strobe light, speaker and arial mounts attached.
They use the same bolt holes as the rear mounts for the passenger grab rails and need no modifications
Complete with the bracket (new) that wraps across the rear of the gantry that had the flashing red/ blue LEDs attached
$60 each
Regards
John