I had someone TIG weld a bracket to the underside of mine for a mount. Cone engineering mufflers don't come with any so your options are endless! You can also make a bracket that the clamp will go around. Here's a couple ideas from my race bike.
A simple cup bracket from the frame to hold the pipe with a clamp.
All painted up. You can see it on the right, it twists 90 degrees from the frame and has a pipe cut in half for the pipe to rest in.
