Contact your local two way radio shop, I'm sure they can offer you a viable solution.

The problem with American's is - they refuse to pay someone to do something professionally when they can screw it up themselves for free!

Most anything related to a county operation should be done by a competent installer, due to the fact that most counties will not let you climb their towers or be on their roofs or install anything that might interfere with their public service radios'.....