Anyone roughly know how much it would cost to get component speakers with tweeters installed? I would like the tweeters to be mounted on the mirrors

 

well that would depend on a couple of things: do you already have the components? or will you buy from the shop? and do you just want installation prices?

 

And where you want the mids mounted, standard locations, or in kicks? Standard locations I will do for under 100.00, and free for friends with beer-
Custom pods can cost several hundred dollars to do right.
Shop the price at reputable stores in your area. If you are doing a full system, then try to get a package deal on the price, and let folks know it is a competitive pricing situation, you should get a good deal.