Jeff. Where did you get the p/n for the antenna? I can't find anything for 84-11-1-470-326. I am only coming up with 84 51 0 016 669 which also retails for almost double what you paid. Am I looking at the wrong part? Also, the ETK lists a few other seemingly related items (antenna line, basis antenna, adapter, and basis antenna). Did you use any of those?