Easy to make some brackets up though, I use a NUT + BOLT that goes all the way through the mount as there are some pikeys etc that like to steal them still.
If you carefully grind off a very small part of the large flat piece of support for the mount you can just slide a 13mm nut up there to secure with a nut bolt, thats what I did, just got to sort the droop out now.
tabetha