Small update: I finally got around to making a shorty antenna. I didn't go with an aftermarket one because most are pretty thick and choady, making it a focal point. I want the antenna to "disappear" so the thin OEM one is perfect.
I cut it to length with a Dremel, pulled the little ball of the end, put a little super glue inside the ball then hammered it onto the new end. I'm going to Plasti-Dip it tomorrow!