Took 2 seconds
https://www.cjponyparts.com/wheel-spacer-hub-centric-25mm-black-pair-focus-st-2013-2018/p/WHSP23/?gclid=CjwKCAjwx6WDBhBQEiwA_dP8rWs1g2oGU8c0fJCNcL6U_1r27jLhMJIlM9jgOqeuARr5ZykS70xE3hoCnikQAvD_BwE
It looks like the same antenna the fusion has. It’s just tight. Use a jar opener pad thing and it should unscrew right off. They make shorty stub antennas that work just as well