2008 Highlander Satellite Radio, help needed

[AnthonyF]

My dealer installed aftermarket Sirius unit has always dropped out under tree lined streets, its horrible. Dealer agreed to change out inline Sirius Unit but now say's they can't find the kit to integrate the unit to the radio. I have to stick with Sirius because I have a lifetime subscription. I can't believe changing out a unit has become such a problem. Does anyone know of a good unit that integrates with the stock audio system? Is the Toyota Sirius unit still available for the 2008s? The antenna has been changed but they wanna try putting a new one on. I really don't think its the antenna. I think the aftermarket unit they installed is just no good. Anyone have a good unit they can recommend?