Hi Dave thanks for the reply. Have sussed it out now. Been off the spanners for too long, needed to walk away, have a brew and see it in a different light. I took the whole bracket with the wings for fitting the plastic one off, 4 bolts, mated it to the Adv bracket stuck the new longer bolt through to hold them together then slipped it in place under the exhaust front pipes, removed the long bolt, shoved to up a-bit more and slipped the new bolt home. Fits like a glove and looks like it can withstand the most harsh terrain out there. Very pleased. Only just finished it so haven't ridden it but if i get the same noises as yourself i'll update you.
Many thanks again
Steve