If you can still hear your antenna motor running then all you need is a replacement mast. About $60 from a honda or acura dealership.
Part # (39152-SM4-A03)

www.teamintegra.net has instructions. You will have to register.

I just bought a replacement antenna from http://www.antennamastsrus.com/ and promptly received it for only $22 including shipping. Won't know how well it works until I install it. You can find them selling on ebay as well but it is cheaper from their website. All good feedback though.

http://cgi.ebay.com/ebaymotors/ws/eB...category=46093