My mom's antenna started going only partially up. The motor was good but the mast was stuck - and she just got it replaced for $80 (!!) at the service station 6 months ago since they were doing the timing belt and water pump.
Anyway, I bought an "OEM" replacement on eBay for $18 shipped and installed it this weekend. It wasn't taking the new antenna cord at first but after a few tries it's perfect. The white cord was a little longer on the newer one and against the instructions that came with the mast, I decided to try it anyway
Works great! Can't believe the service station charged so much. I love being able to do small things myself. I think I'll practice fixing things on my mom's car.. My car is still a little too new. Heh. Next project on her car is fixing the seat belt retractors!