Antenna nut

I lost the chrome nut that holds my radio antenna up on my 63 dart.

I will post a picture tomorrow.

I was unscrewing it to put a car over on the car without having to put a hole through it for the antenna . But I forgot once to put it back up after removeing the cover. :oops:

I may just get this :

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170718149352

If I can't find an original cheap enough.