Cheers danny, that was my bros idea too. Will get some pics up if I have no joy later.
Peperami, not sure if they are the same ones they fit to the cup racers, I dont think they are mind, they have no atatchment clips or anything, they are just trumpets. They look like they will fit okay, with no gaps, but there is not a lot of contact are between the bumper and the trumpet for me to bond them.
I think some foam in lip around the trumpet might work, them bond that too the bumper. Not sure really.