2008 Head Unit

I'm sure this has been answered before, but I can't find it through the search function. I have a 2008 double cab, and I'd like to add the aux input, but I don't like the look of aftermarket head units. Does anyone know what year it was included on the factory head unit, and if that head unit would fit my 2008? I like the stock look, but is the factory unit from another year with the aux input not worth it, and an aftermarket head unit a better option?