I found a Polo Shark fin one on ebay at a good price. It was worth a go for the price, couple of days later the aerial turned up and I set about fitting it.
The only issue was the plug on the aerial end. Its the same as the one coming from the stereo.
I simple cut the ends off and wired them together. Sorted. As for radio quality, its ok. I don't listen to the radio and not really bothered by the quality but I pick up all the national and local stations.
|Pop the cap off and Remove the nut|
|Top from the car. Bottom From the aerial. Cut ends off and rejoin.|
|The Finished aerial|