I would like to mount the head of the Dino Triceratops, Item No: 30460, onto a brick/connector so it would be possible to fix it to a wall or over a door entrance. Any ideas on that?
I don't have this particular piece but my advice for most 'non-standard' connections such as these is to use a part that is flexible enough to fit the gap.
The 'Technic, Axle Connector Double Flexible' piece under compression can make a snug enough fit to mount a sharks head.
If you turn the rubber brick 90 degrees on it's side and place two of them together you might be able to attach something that isn't as wide.