If you want to go brand new Metra, sells new power antennas.
Metra as in Metra Kits & wire harness for aftermarket radios.
I don't know how good the quality or waranty is for there antennas, but there kits & harness for installing aftermarket radios are favorite among electronic installers.
Here is there site:
You can't buy directly but they have a link for finding a representative (stereo shop etc.)
I'm thinking of getting one myself, I already replaced the original with one from the scraper and its not much better.
When I last checked the price direct from authorized distributor I think cost was $80 Canadian.
Nice ride by the way looks the exact same as my 92.