I'm having a heck of a time finding this antenna base. I don't know what to call it, but I think it's the radio and XM combined. Searches for it bring up a several types that don't look like this one. It's the one that's rounded across the top with large humps on either side. Can somebody give a link or part number for it? I'll need a new whip and probably a gasket as well. Here's a photo of what I'm looking for. I got this from a site that doesn't have any in stock.