Two places i can think of, There's HRO (Ham Radio Outlet) and the other is Radio Service Center they deal with C.B.'s, Ham, Business radios and Marine radios. Try them..
No problem. Just sent a you a PM if you wanted there # and address..My first programable scanner came from Radio Service Center. And they even repair a CB radio that i had, a Teaberry T-Charlie one..of course this was in mid 70's...good luck on your find..