I purchased Scott Drake antenna NPD Part Number: 18813-3D. I found it to have all the OEM features (grommet, sheet metal retainers, black teardrop base etc.) as shown in the assembly manual. The only difference I found was the cover is stainless. I polished it to look like chrome, so no problem. Don't forget the extension cable if you don't have one. Alan
edit: After months of use, it seems the antenna doesn't have the reception as my former NOS replacement antenna. Also the mast can easily pulled off the post. But it looks factory correct.