they used to use that at race tracks, one of my fellow marshals tried to kick a roll off the track and it stuck to his boot.
Ive got a straight thru on the B40 thats going to be very noisy.
if you can, a round disc, with a hole in the middle welded to a tube with a lot of holes around and wrapped with exhaust wadding will be my method possibly with a hole or thread or nut welded on to hold in place with a bolt from the outside.