I'm not sure if RowdysMom is talking about the exact same one I have but here's ours...
http://www.pettails.com/consolelookout.html
Don't remember where I originally got mine from but Tatums first one got torn up by our new puppy while it was waiting to be put into the new Tahoe so I bought one from a member here (the same kind) that couldn't use it in her vehicle. But if this is the right one, just do a search for Lookout pet car seat and you should find them in different stores - even in Ebay sometimes.