Antenna is not the problem, it's the mount.
What do you have, an IS or ?
Now that I own a GL1200 mount, and have a Valk CB ant, I will remove my radio antenna from it's mount, and place the CB one there instead, on the right side. I was a waist trying to figure out a mount for it.
Then buy an inexpensive AM/FM wire radio antenna, and hide it in my IS fairing ($7)
You can also use an AM-FM/CB splitter and the GL1200 CB antenna. Honda offered one as part of their Type II (GL1100) radio setup, and Sierra offers them as new products.