CBR40 satellite options

Hello,

I've searched for this answer already - this isn't the easiest forum to navigate nor does is this question easily answered based on what I saw on the "buy now" page.  I have the CBR40 cable modem that came with the RBS20 satellite. I'd like to get one other satellite but am unsure of what my options are. Ideally I'd like to have a stand alone satellite as opposed to something I would have to plug into an outlet.  

Thanks!